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  1. #1
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    Please, help to understand CMOS amplifier circuit

    Here is what appears to be some sort of a folded cascode amplifier, but does not really match with any classic text book example. Does it make sense to you guys?
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  2. #2
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    Re: Please, help to understand CMOS amplifier circuit

    Are you sure the transistors on top, connected to Vdd are really NMOS, especially that "current mirror"?


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  3. #3
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    Re: Please, help to understand CMOS amplifier circuit

    You are probably right, n-channel transistors should all go to GND and p-channel to Vdd, so I must have it backwards except for the photo diode which should be reverse biased



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  4. #4
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    Re: Please, help to understand CMOS amplifier circuit

    Actually power is correct, but all the p-channel transistors should be n-channel and vice versa.



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