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CMOS Inverter Gate Analog Amplifier
In this video, Gregory explains how an inverter logic gate can be used as an analog amplifier.
The internal arrangement of a CMOS NOT logic gate is almost exactly the same as a NMOS common source amplifier with a dynamic active PMOS load.
This simple amplifier is useful when high gain product bandwidth is needed, as in IF amplifiers, crystal ladder buffers and detection of small RF signal.
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00:20 - Working principle
06:35 - Logic Gate Amplifier
07:41 - Circuit working
09:15 - Parameters table
10:14 - Using feedback to control the gain
12:00 - Circuit working with negative feedback
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this is pretty much the only video in regard to this topic. Congratulations. Cheers
@AllElectronicsChannel
2 жыл бұрын
Thank you! Share the channel with your friends to help me grow it
Very interesting. In Russia, there were once circuits of radio receivers based on logic elements. Your Tektronix MDO is my dream.. Cool content. Continue to please us with your videos! ;)
@AllElectronicsChannel
4 жыл бұрын
Nice ! Do you have some schematics? The MDO is a nice equipment, but sometimes I prefer the Agilent dsox. Thank you for your support!
@segrus
4 жыл бұрын
All Electronics Channel I'm an electronics engineer at a military firm. All my life is connected with schemes. The equipment is mostly Chinese, very bad.. Ok, I am glad to meet you! Have a nice day!)
Isn't this just basically a Class-B amplifier? Curious about the amount of crossover distortion.
@AllElectronicsChannel
4 жыл бұрын
The topology looks like a class B but it's actually more like a coupled class A pair or a class A with active load. You can see that each MOS is doing active gain in a common emitter configuration. A classical class B would work as source followers without voltage gain. We could measure the thd of one stage !
Muito bom esse vídeo :)
@AllElectronicsChannel
Жыл бұрын
Thanks friend!
Just curious, could this be used as an audio input buffer to drive an ADC?
@AllElectronicsChannel
3 жыл бұрын
It can work! But it will be far from good design!
What are capacitor values at input and output?
@AllElectronicsChannel
2 жыл бұрын
They need to be a short (low reactance) for the frequency of operation. I think I used 10nF..
Yo should have used the 4069UB instead and it will be more clear....
@AllElectronicsChannel
4 жыл бұрын
I read it was necessary to use unbuffered gates. But trying with the HC04 using a low impedance output to increase gain margin seems to work fine as I demonstrated !