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it is OTA labelled OPA!
Added after 3 minutes:
i think i need feedback to get precise gain."OTAs do not need feedback !",can u explain it more?thanks a lot!
regards
the dc voltage of the input signal is 0.9,which is needed to bias the input nmos of the opamp.while the small signal maybe is sevral mv.even in this condition,there is no other solution?
the dc voltage is amplified together?
thanks a lot
regards
a basic amplify circuit as follows.
the needed gain is 10.the power voltage is 1.8v.when the input dc voltage is 0.9v,because the feedback factor is 1/9,the output dc voltage should be 9v,so the opamp can not work.
how to resolve the problem?are there any other architechture?please introduce...
Assuming there is no other nonideal effect except the current mismatch in charge pump,is there phase error when pll is locked?if there is,the phase error is fixed or changing?and why?thanks a lot
hi guys! mathcad is used to build behavioral models of circuits frequently?in my opinion,simulink is convenient.why we still use mathcad.after all,we can only use equations to build behavioral models of circuits with mathcad.thanks a lot
thank psmon for your reply.you mean just make use of the capacitor of the lpf,right?and several hundred pF capacitors in chip is acceptable?they take so large areaes.best regards
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