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ac coupled inverting amp
I don't think an inverting amplifier must have capacitors. Maybe there is so large DC offset in your input signal that the circuit can't work properly unitil you correctly configure your circuit.
Thank you for your reply.
I've seen someone esle used one capacitor to realize this function, but it gets a pulse voltage, not continuous voltage output, with more control timing.
I saw some ducuments present a symbol of differential amp as this sum circuit, and they explain it's realized on...
For V1=2.5v~5v, V2=2.3v~2.7v,
How can I get the V=V1-V2 by the circuit in standard CMOS technology (not using resistors)? Could it be done with a fully differential amplifier?
Actually, I want to get a single voltage output V=V1-V2.
Re: analog n digital ground
for the analog circuit not to be disturbed by the high frequency signal in the digital part.
but how does it work? Before the digital signal is linked to ground, are there some processing procedures?
hspice pspice difference
in my experience, hspice has algorithm with better convergence, and the foundry seems to be more likely to provide hspice model.
basic differential amplyfier
Yes. When the loop of amp gets closed, the bias voltage can almost be any value between positive supply power and negtive supply. Of couse, the middle value is better for maxium signal output swing.
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