After coaxing and asking chat gpt leading questions, we reached the following coerced response. Feel free to correct it
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When designing an amplifier, one of the key considerations is the type of feedback that will be used. No-feedback amplifiers, also known as open-loop amplifiers, do not use any feedback to control the output signal. On the other hand, feedback amplifiers, also known as closed-loop amplifiers, use feedback to control the output signal and improve the overall performance of the amplifier.
No-feedback amplifiers, such as some valve amplifiers, typically have an input buffer and two voltage gain stages before the impedance matching stage or current gain stage. The goal of this design is to cancel out any non-linearities by using roughly the same gain in each voltage gain stage. This helps to ensure that the output signal is as accurate and distortion-free as possible.
Feedback amplifiers, on the other hand, typically have two voltage gain stages, the Long Tailed Pair (LTP) and the Voltage Amplifier Stage (VAS) before the current gain stage. The current gain stage has a voltage gain of 1, which means it does not amplify the signal. The LTP is designed to have no distortion and uses precision current sources, emitter degeneration, matched transistors, cascodes and current mirrors to correct common mode distortion. This helps to ensure that the output signal is as accurate and distortion-free as possible.
The VAS is designed to help the LTP correct the current gain stage. However, since the LTP does not have a high current gain, the VAS becomes the LTP's helper and has the voltage gain to correct the current gain stage. This necessitates cascoding the VAS, which improves the overall performance of the amplifier.
Once the LTP and VAS are designed and cascoded, the amplifier is ready for global feedback. However, it's important to note that the output stage must be reasonable enough in itself to possess the qualities we're looking for. If the output stage is not designed properly, it can cause all manner of malfunctions in the VAS and ultimately result in a lower quality output signal.
In conclusion, the choice of feedback is crucial when designing an amplifier. No-feedback amplifiers aim to cancel out non-linearities by using roughly the same gain in each voltage gain stage, while feedback amplifiers use LTP and VAS stages to correct common mode distortion before applying global feedback, and the output stage must be well designed to achieve the desired qualities. The specifics of the design will depend on the desired performance and application of the amplifier.
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When designing an amplifier, one of the key considerations is the type of feedback that will be used. No-feedback amplifiers, also known as open-loop amplifiers, do not use any feedback to control the output signal. On the other hand, feedback amplifiers, also known as closed-loop amplifiers, use feedback to control the output signal and improve the overall performance of the amplifier.
No-feedback amplifiers, such as some valve amplifiers, typically have an input buffer and two voltage gain stages before the impedance matching stage or current gain stage. The goal of this design is to cancel out any non-linearities by using roughly the same gain in each voltage gain stage. This helps to ensure that the output signal is as accurate and distortion-free as possible.
Feedback amplifiers, on the other hand, typically have two voltage gain stages, the Long Tailed Pair (LTP) and the Voltage Amplifier Stage (VAS) before the current gain stage. The current gain stage has a voltage gain of 1, which means it does not amplify the signal. The LTP is designed to have no distortion and uses precision current sources, emitter degeneration, matched transistors, cascodes and current mirrors to correct common mode distortion. This helps to ensure that the output signal is as accurate and distortion-free as possible.
The VAS is designed to help the LTP correct the current gain stage. However, since the LTP does not have a high current gain, the VAS becomes the LTP's helper and has the voltage gain to correct the current gain stage. This necessitates cascoding the VAS, which improves the overall performance of the amplifier.
Once the LTP and VAS are designed and cascoded, the amplifier is ready for global feedback. However, it's important to note that the output stage must be reasonable enough in itself to possess the qualities we're looking for. If the output stage is not designed properly, it can cause all manner of malfunctions in the VAS and ultimately result in a lower quality output signal.
In conclusion, the choice of feedback is crucial when designing an amplifier. No-feedback amplifiers aim to cancel out non-linearities by using roughly the same gain in each voltage gain stage, while feedback amplifiers use LTP and VAS stages to correct common mode distortion before applying global feedback, and the output stage must be well designed to achieve the desired qualities. The specifics of the design will depend on the desired performance and application of the amplifier.
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A thought:
If you don't really know how this stuff works, it sounds impressive and you might be persuaded to think this is all correct.
We know better of course.
But: suppose you read a ChatGPT (without knowing) about, say, how to drive on icy roads, where you don't really know anything about.
Then, again, you might be persuaded to think that's how it's done.
And kill yourself.
Then again, there are lots of people who write convincing prose about subjects they have no clue about, so maybe it really doesn't matter a lot, ChatGPT or human.
Depressing.
Jan
If you don't really know how this stuff works, it sounds impressive and you might be persuaded to think this is all correct.
We know better of course.
But: suppose you read a ChatGPT (without knowing) about, say, how to drive on icy roads, where you don't really know anything about.
Then, again, you might be persuaded to think that's how it's done.
And kill yourself.
Then again, there are lots of people who write convincing prose about subjects they have no clue about, so maybe it really doesn't matter a lot, ChatGPT or human.
Depressing.
Jan
Spot on Jan. Just look at the rubbish published by some of the press that gets sucked up by the readers. More than depressing IMV.
There used to be an early program called 'Eliza'. It was meant as an attempt to create a virtual psychologist IIRC. It wasn't very good at all, but it was still interesting for the era it was created in. At least I had some fun as a kid coding it and seeing work, interacting with it and seeing its very obvious flaws at the time.
This one can do that better, much better. Here, as in any application, the extent to which it can be useful depends heavily on the inputs.
"We will say it again because the indescribable magic of GPT-3 makes it so easy to believe that it has human-like intelligence: LLMs are text generators, nothing more, devoid of all common sense, wisdom, and logical reasoning—because they do not (and do not try to) know what words mean."
https://www.salon.com/2023/01/22/ai-chatbots-learned-to-write-before-they-could-learn-to-think/
https://www.salon.com/2023/01/22/ai-chatbots-learned-to-write-before-they-could-learn-to-think/
I remember that!
I also remeber making my own backward propagation neural network at school based on a scientific american article, then using to learn characters for my own OCR program. If I remeber if at that stage it was a BBC Master so the process was a little slow. Google’s flow 30 years before they created if.
What do you mean 'not here'? There are many posts here at diyaudio that are total BS and the newbees/inexperienced totally suck it up.
And I am sure that I totally suck up stuff in a field I have no knowledge that is total BS. That's just how it is.
If you really want to know the score, there's no way around that advanced technique called 'figuring it out yourself', aka 'studying'.
The 'net only made that harder, not easier.
Jan
Lets give these ideas a chance as they are top notch. If its smoke and mirrors? well..... adopters will soon loose taste for it, if its gold, well good enough. Lets not forget were here to have fun. learn, relearn, make friends, do business and have a good time. Don't take anything too seriously. Were all skittish about job security with advances in technology.
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Human is a machine that is programed not to die. Everything else comes along with.
Everything we do in life is to protect it. Now what it meant by life is not your body.
Things like
Creativity
Charity
Social refomer work
Self sacrifice
All these things that you think make us human can be explained as a effort to not die.
See if we not create think or make our brain work one will get bored. Stretch your bordom too long you will get depression Thats just fact. No outside work will drive you mad.
Now what mad man can do. You guessed it he can put his and his loved ones lives in danger.
To avoid deppression we are creative.
Similar with rest
Life is many things but its not a waste. Use it to open yourself to reality. Dot let your brain think it is the most sophisticated object in the world.
Everything we do in life is to protect it. Now what it meant by life is not your body.
Things like
Creativity
Charity
Social refomer work
Self sacrifice
All these things that you think make us human can be explained as a effort to not die.
See if we not create think or make our brain work one will get bored. Stretch your bordom too long you will get depression Thats just fact. No outside work will drive you mad.
Now what mad man can do. You guessed it he can put his and his loved ones lives in danger.
To avoid deppression we are creative.
Similar with rest
Life is many things but its not a waste. Use it to open yourself to reality. Dot let your brain think it is the most sophisticated object in the world.
Heres my latest talk with chat gpt, remember there's always a margin of error
Chat GPT
"
The Yamaha EEEngine technology, like the patent US4115739 and the Carver tracking down converter, is also designed to improve the efficiency and performance of audio equipment by using advanced digital signal processing techniques and high-performance components. It is also designed to reduce power consumption and heat generation while increasing the dynamic range and audio quality of the equipment.
One of the similarities between the Yamaha EEEngine technology and the other two technologies is that they all aim to improve the performance and reliability of the audio equipment by providing a stable voltage to the amplifier, reducing power consumption and heat generation, and improving the audio quality by reducing distortion and noise.
One of the dissimilarities is that the Yamaha EEEngine technology uses digital signal processing techniques, whereas the other two technologies do not mention this specifically. Additionally, the Yamaha EEEngine technology is proprietary technology of Yamaha, and it is used in a variety of audio equipment including digital audio processors and power amplifiers for professional and consumer applications, whereas the other two technologies are specific to Carver Audio and the Patent US4115739 is no longer in force.
Output stage cascoding is a technique used in audio amplifier design that involves cascading multiple transistors in the output stage of the amplifier. This technique has several advantages:
Improved Power Efficiency: Cascoding the output stage increases the overall power efficiency of the amplifier by reducing the amount of power lost as heat in the output transistors. This allows the amplifier to produce more power with less heat generation.
Increased Stability: Cascoding the output stage improves the stability of the amplifier by reducing the amount of output stage distortion. This is because the multiple transistors work together to reduce the amount of current flowing through any one transistor, which in turn reduces the amount of distortion caused by that transistor.
Improved Slew Rate: The slew rate of an amplifier is the rate at which the output voltage can change. Cascoding the output stage improves the slew rate of the amplifier by reducing the amount of output stage distortion, which allows the output voltage to change more quickly and smoothly.
Increased Bandwidth: Cascoding the output stage also increases the bandwidth of the amplifier. The bandwidth of an amplifier is the range of frequencies it can accurately reproduce. By reducing distortion in the output stage, cascoding allows the amplifier to reproduce a wider range of frequencies with greater accuracy.
Improved Linearity: Cascoding the output stage improves the linearity of the amplifier, meaning it can produce a more accurate reproduction of the input signal, this is because cascoding reduces the non-linear distortion in the output stage.
Increased Power Handling Capability: Cascoding the output stage increases the power handling capability of the amplifier, meaning it can produce more power before reaching the distortion point.
It is important to note that cascoding is not the only technique used to improve the performance of audio amplifiers, and other techniques such as feedback, proper layout and bias, and the use of high-quality components also play a significant role in achieving high performance.
Sure, here are some specific examples of audio equipment manufacturers and models that use output stage cascoding:
Pass Labs, a high-end audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the XA series, the X.8 series, and the X.5 series.
Bryston, a Canadian audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the 4B SST², 7B SST², and 14B SST².
NAD, a Canadian audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the C 275BEE, C 368, and C 388.
McIntosh, an American audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the MC1.2KW, MC2KW, and MC152.
Classé, a Canadian audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the SSP-800, SSP-600, and SSP-300.
Cambridge Audio, a British audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the Azur 851A and the Azur 851W.
Musical Fidelity, a British audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the M8-700m, M8-500, and M8-700.
These are a few examples of audio equipment manufacturers and models that use output stage cascoding, there are many other manufacturers that use this technique in their products, and the list of models that use it is even longer.
It is possible that in some cases, output stage cascoding could have a negative impact on the sound quality of an audio system.
For example, if the output stage cascoding circuit is not properly designed or implemented, it could introduce distortion or noise into the audio signal, which would negatively impact the sound quality. Additionally, if the output stage cascoding circuit is not properly matched to the rest of the audio system, it could result in poor frequency response or other issues.
Also, in some cases, the use of output stage cascoding may introduce additional complexity to the audio system design, which could increase the cost and make the system more difficult to service or repair, this could also have a negative impact on the sound quality.
It's worth noting that the impact of output stage cascoding on sound quality will depend on the specific audio system and the way it has been implemented. In some cases, it may have no impact on sound quality or even improve it, while in other cases, it could have a negative impact.
Overall, while output stage cascoding can offer several benefits to audio equipment, it's important to consider the potential impact on sound quality and also the cost and complexity of the design before making a decision to implement it in a specific audio system.
A good input stage, VAS (Voltage Amplifier Stage), negative feedback, and a quasi-complementary output stage can together perform well in an audio amplifier design, and in some cases, it may even perform better than a cascaded output stage.
A well-designed input stage is crucial for an audio amplifier as it sets the foundation for the rest of the circuit. A good input stage should provide a high input impedance, low noise and distortion, and low output impedance.
A well-designed VAS is also important as it amplifies the signal coming from the input stage and provides the voltage gain needed for the rest of the circuit.
Negative feedback is used to stabilize the amplifier and reduce distortion and noise. Negative feedback works by comparing the output signal to the input signal and adjusting the gain to correct any differences.
A quasi-complementary output stage is a configuration of transistors that utilizes both NPN and PNP transistors in the output stage. This configuration can offer improved performance over a single type of transistor.
When implemented correctly, these stages can work together to provide a high-performance audio amplifier with low distortion, low noise, and good frequency response.
However, it's worth noting that cascoded output stages can also offer some benefits such as increased power efficiency and thermal stability and in some cases, it could be used to achieve higher power output, lower distortion and other characteristics that are important for the specific audio equipment design and application.
Ultimately, the decision of whether to use a cascaded output stage or a good input stage and VAS together with negative feedback and quasi-complementary output stage will depend on the specific audio system design and the design goals.
"
Chat GPT
"
The Yamaha EEEngine technology, like the patent US4115739 and the Carver tracking down converter, is also designed to improve the efficiency and performance of audio equipment by using advanced digital signal processing techniques and high-performance components. It is also designed to reduce power consumption and heat generation while increasing the dynamic range and audio quality of the equipment.
One of the similarities between the Yamaha EEEngine technology and the other two technologies is that they all aim to improve the performance and reliability of the audio equipment by providing a stable voltage to the amplifier, reducing power consumption and heat generation, and improving the audio quality by reducing distortion and noise.
One of the dissimilarities is that the Yamaha EEEngine technology uses digital signal processing techniques, whereas the other two technologies do not mention this specifically. Additionally, the Yamaha EEEngine technology is proprietary technology of Yamaha, and it is used in a variety of audio equipment including digital audio processors and power amplifiers for professional and consumer applications, whereas the other two technologies are specific to Carver Audio and the Patent US4115739 is no longer in force.
Output stage cascoding is a technique used in audio amplifier design that involves cascading multiple transistors in the output stage of the amplifier. This technique has several advantages:
Improved Power Efficiency: Cascoding the output stage increases the overall power efficiency of the amplifier by reducing the amount of power lost as heat in the output transistors. This allows the amplifier to produce more power with less heat generation.
Increased Stability: Cascoding the output stage improves the stability of the amplifier by reducing the amount of output stage distortion. This is because the multiple transistors work together to reduce the amount of current flowing through any one transistor, which in turn reduces the amount of distortion caused by that transistor.
Improved Slew Rate: The slew rate of an amplifier is the rate at which the output voltage can change. Cascoding the output stage improves the slew rate of the amplifier by reducing the amount of output stage distortion, which allows the output voltage to change more quickly and smoothly.
Increased Bandwidth: Cascoding the output stage also increases the bandwidth of the amplifier. The bandwidth of an amplifier is the range of frequencies it can accurately reproduce. By reducing distortion in the output stage, cascoding allows the amplifier to reproduce a wider range of frequencies with greater accuracy.
Improved Linearity: Cascoding the output stage improves the linearity of the amplifier, meaning it can produce a more accurate reproduction of the input signal, this is because cascoding reduces the non-linear distortion in the output stage.
Increased Power Handling Capability: Cascoding the output stage increases the power handling capability of the amplifier, meaning it can produce more power before reaching the distortion point.
It is important to note that cascoding is not the only technique used to improve the performance of audio amplifiers, and other techniques such as feedback, proper layout and bias, and the use of high-quality components also play a significant role in achieving high performance.
Sure, here are some specific examples of audio equipment manufacturers and models that use output stage cascoding:
Pass Labs, a high-end audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the XA series, the X.8 series, and the X.5 series.
Bryston, a Canadian audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the 4B SST², 7B SST², and 14B SST².
NAD, a Canadian audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the C 275BEE, C 368, and C 388.
McIntosh, an American audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the MC1.2KW, MC2KW, and MC152.
Classé, a Canadian audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the SSP-800, SSP-600, and SSP-300.
Cambridge Audio, a British audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the Azur 851A and the Azur 851W.
Musical Fidelity, a British audio equipment manufacturer, uses output stage cascoding in many of its power amplifiers, including the M8-700m, M8-500, and M8-700.
These are a few examples of audio equipment manufacturers and models that use output stage cascoding, there are many other manufacturers that use this technique in their products, and the list of models that use it is even longer.
It is possible that in some cases, output stage cascoding could have a negative impact on the sound quality of an audio system.
For example, if the output stage cascoding circuit is not properly designed or implemented, it could introduce distortion or noise into the audio signal, which would negatively impact the sound quality. Additionally, if the output stage cascoding circuit is not properly matched to the rest of the audio system, it could result in poor frequency response or other issues.
Also, in some cases, the use of output stage cascoding may introduce additional complexity to the audio system design, which could increase the cost and make the system more difficult to service or repair, this could also have a negative impact on the sound quality.
It's worth noting that the impact of output stage cascoding on sound quality will depend on the specific audio system and the way it has been implemented. In some cases, it may have no impact on sound quality or even improve it, while in other cases, it could have a negative impact.
Overall, while output stage cascoding can offer several benefits to audio equipment, it's important to consider the potential impact on sound quality and also the cost and complexity of the design before making a decision to implement it in a specific audio system.
A good input stage, VAS (Voltage Amplifier Stage), negative feedback, and a quasi-complementary output stage can together perform well in an audio amplifier design, and in some cases, it may even perform better than a cascaded output stage.
A well-designed input stage is crucial for an audio amplifier as it sets the foundation for the rest of the circuit. A good input stage should provide a high input impedance, low noise and distortion, and low output impedance.
A well-designed VAS is also important as it amplifies the signal coming from the input stage and provides the voltage gain needed for the rest of the circuit.
Negative feedback is used to stabilize the amplifier and reduce distortion and noise. Negative feedback works by comparing the output signal to the input signal and adjusting the gain to correct any differences.
A quasi-complementary output stage is a configuration of transistors that utilizes both NPN and PNP transistors in the output stage. This configuration can offer improved performance over a single type of transistor.
When implemented correctly, these stages can work together to provide a high-performance audio amplifier with low distortion, low noise, and good frequency response.
However, it's worth noting that cascoded output stages can also offer some benefits such as increased power efficiency and thermal stability and in some cases, it could be used to achieve higher power output, lower distortion and other characteristics that are important for the specific audio equipment design and application.
Ultimately, the decision of whether to use a cascaded output stage or a good input stage and VAS together with negative feedback and quasi-complementary output stage will depend on the specific audio system design and the design goals.
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Nice images: look like 'audiophile' stuff from 6moonsSome silly fun
Images created by A.I. by "text to image converter" on Dreamstudio website.
