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Chip Amps Amplifiers based on integrated circuits

How really do chip amps work?
How really do chip amps work?
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Old 19th March 2018, 08:28 AM   #31
suzyj is offline suzyj  Australia
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Oscilloscopes can have multiple channels, each of which have two wires, one of which is generally (but not always) connected to ground. There are differential probes, which show the difference between the two connections. Also you can “float” many modern oscilloscopes and connect the ground reference for the whole instrument to an AC or DC voltage. Finally you can do math between two channels, so for example you could do the difference between channel 1 and 2.
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Old 19th March 2018, 08:43 AM   #32
jazbo8 is offline jazbo8
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How really do chip amps work?
Quote:
Originally Posted by BasicHIFI1 View Post
The final capacitor is able to remove all DC voltage?
Also, is this assumption correct?
It is a lot clearer now, but need to breadboard some stuff an experiment.
Haven’t you been down this road a couple of times already? Did you forget everything you learned?
Understanding Transistor amplifier with an online simulation

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Old 19th March 2018, 08:58 AM   #33
Mooly is offline Mooly  United Kingdom
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How really do chip amps work?
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Originally Posted by Mooly View Post
The capacitor does allow DC to pass and so this allows the DC conditions of each stage to be set by the designer.
Typo on my part.

Should read:

The capacitor does not allow DC to pass
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Old 19th March 2018, 10:35 AM   #34
Mooly is offline Mooly  United Kingdom
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How really do chip amps work?
Quote:
Originally Posted by BasicHIFI1 View Post
The final capacitor is able to remove all DC voltage?

Also, is this assumption correct?

It is a lot clearer now, but need to breadboard some stuff an experiment.
See if you can understand and work out how this works. The input is a 1 volt sine centred around zero volts.

What do you think you will see at points A, B and Vout ?

What is the DC voltage at those three points ?

What will happen to the AC signal at those points ?

Hint... the values and numbers make it easy to work out. No calculator required
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File Type: jpg DC1.JPG (141.3 KB, 24 views)
File Type: jpg DC2.JPG (251.8 KB, 24 views)
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