anhnha
Full Member level 6
This is a tuned amplifier. I have two problems hope anyone here could make them clear.
1. As we know the output voltage swings above VDD. I can explain it from summing of DC and small signals.
However, is there a physics explanation for that? I mean using characteristic of R, L, C components.
2. For DC analysis, assuming that Vin and VDD are fixed and Vin is chosen so that the transistor is always in saturation.
(Vth < Vin < VDD + Vth)
Now from square law equation, the current Id from D to S should be constant and independent with shape ration W/L.
Is that right?
1. As we know the output voltage swings above VDD. I can explain it from summing of DC and small signals.
However, is there a physics explanation for that? I mean using characteristic of R, L, C components.
2. For DC analysis, assuming that Vin and VDD are fixed and Vin is chosen so that the transistor is always in saturation.
(Vth < Vin < VDD + Vth)
Now from square law equation, the current Id from D to S should be constant and independent with shape ration W/L.
Is that right?
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