Hello for a basic current mirror when we do an output current characteristics then we sweep test voltage source and measure mos drain current.
To calculate the incremental output resistance i saw a remark that we need 1V DC bias to put into into Vdc source and Ac magnitude to make 1u.
I have three question for this situation:
1.what is the effect of connecting Voltage source in series with current source?
the current source will force a certain current , and the voltage source will force a voltage on the end of the current source?
2.when we are testing output current we put on the output DC voltage source and sweeping it measuring the current.
how adding another test voltage source not interfering with the behavior of the circuit?
is there more passive way to measure the voltage and current on the output?
3.when measuring output resistance(output impedance) do we need to put 1V bias voltage in the Vdc source beyong the Vac 1uV amplitude?
or we could test impedance with AC magnitude only?
Thanks
