John Curl's Blowtorch preamplifier part II - Page 2686 - diyAudio
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Old 22nd August 2012, 07:30 PM   #26851
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Note, everyone, that what is useful is something both buildable and BETTER, even in theoretical approach. For example all balanced is better than single sided driver stage.
The design should be fast, low noise, and open loop LINEAR. Open loop bandwidth is debatable. Look at the topology of the AD797, for a good example.
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Old 22nd August 2012, 09:49 PM   #26852
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Originally Posted by simon7000 View Post
Before I go further let's see if we can get agreement on a really simple circuit.

Pavel, Wavey, Scott, SY and anyone else interested, would you each please post an answer to what is the power dissipated in the resistor in the attached circuit?
10 volts what? Peak? RMS? Average? Peak to peak?

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Old 22nd August 2012, 09:50 PM   #26853
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Well back to business: I wish that I had a better schematic maker. It would be easier to show the evolution of an electronic gain block, with pictures.
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Old 22nd August 2012, 09:56 PM   #26854
miklos is offline miklos  Canada
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Originally Posted by morinix View Post
For parts one and two together it's been 6 years, 7 months, 15 days As John says, go and read the first few 100 posts in part one.
Last he said the first 80 pages, you save 20
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Old 22nd August 2012, 09:59 PM   #26855
miklos is offline miklos  Canada
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Originally Posted by Wavebourn View Post
I think, the question should start from what the market would prefer: an analog of a famous opamp, or an opamp that would beat the famous opamp, or a preamp that will beat preamps that used that famous opamp?
...or just one without a ton of gain and a ton of NFB.
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Old 22nd August 2012, 10:47 PM   #26856
morinix is offline morinix  United States
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Last he said the first 80 pages, you save 20
I don't know just start reading from the top 'till the nuggets show
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Old 22nd August 2012, 10:51 PM   #26857
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...or just one without a ton of gain and a ton of NFB.
...or the one with praised name, in a praised box, with praised components, without things that believed to "compromise" the sound.
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Old 22nd August 2012, 11:02 PM   #26858
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10 volts what? Peak? RMS? Average? Peak to peak?

se
RMS. Average would be zero. Peak would be noted. There really are standard conventions.
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Old 22nd August 2012, 11:16 PM   #26859
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RMS. Average would be zero. Peak would be noted. There really are standard conventions.
Average would be zero? Far as I'm aware, the average of 10 VRMS is 8.99 V.

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Old 22nd August 2012, 11:31 PM   #26860
bcarso is offline bcarso  United States
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Average would be zero? Far as I'm aware, the average of 10 VRMS is 8.99 V.

se
Yes; the a.c. average is 2/pi times the peak value, the a.c. rms value 2^(-1/2) times the peak value.

And, actually, most simulators have generators that require specifying the peak value.

Of course, in the absence of an offset, the average d.c. value over an integer number of cycles is zero.
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