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Impedance of capacitor is 1/jwC . At zero frequency , impedance is infinite and at infinite frequency impedance is 0. So capacitor acts as a open circuit at zero frequency and short circuit at infinite frequency. So AC->R->C acts as a low pass filter and AC ->C->R acts as high pass filter.
Hi ,
I would like to learn and use the circuit in the attached fig for generating ix =200uA from vx=1.25 ( ie bandgap voltage) . Are there any material/books/paper you can refer to about this circuit.
What is the purpose of NMOS ? and in which region should it be?
what happens if it is in...
I am using NPN. Should i increase current for higher beta?
Also is using vertical NPN better or vertical PNP ?
for PNP with base connected to ground, will there be base current?
Thank you. Room temp is 25C. Got it.
I dont know what is meant by curvature compensated BGR. This is the first time i am working on bandgap. My circuit is Fig1 in attachment without R1 and R2. Is it curvature compensated? What is curvature compensation?
Yes the increase of VREF at high temp...
So, Ideally bandgap voltage should be constant with changing temperature.
But which one of the below is better to have
1) bandgap voltage increasing with increase in temperature .
2) bandgap voltage having curvature with increase in temperature.
What is important information in MOS operating point below?
What does betaeff stand for? How to use it?
How to get delta ie vdsat?
What capacitances are important?
I know about id, gm, gds, region , vgs , vds, vth etc.,
signal OP("/M0" "??")
betaeff 1.847746m...
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