circuitking
Full Member level 5
Hi, I found relative answers to the question but I want a little clarity.
https://www.edaboard.com/showthread...apacitance-and-output-capacitance-of-a-MOSFET
https://www.edaboard.com/showthread...-Z11-ZM-and-ZP-in-calculating-input-impedance
https://www.edaboard.com/showthread.php?168947-Plotting-inductance-from-Z(im)-Cadence-calculator
https://www.edaboard.com/showthread...-plot-of-L-vs-freq-of-an-inductor-(SpectreRF)
I mentioned it as reactance as a general case but I know it is mostly capacitance. How do I find input/output capacitance of a gain stage/MOSFET/Network?. Usually it is the imaginary part of the total input/output impedance. So If I do SP simulation and plot the imaginary part of ZP from direct plot, It will give me the input/output capacitance of a gain stage. Correct? But why do some people use YP from direct plot for this purpose. I just want to know which parameter to use (Say ZP) and what modifications I should make if I use the other parameters(Say YP).
P.S I know if the network has series connection it is easier to use Z parameters and If it is parallel connections it is easier to use Y parameters. But If we consider the network as a block box we wouldn't know how the connections are inside.
https://www.edaboard.com/showthread...apacitance-and-output-capacitance-of-a-MOSFET
https://www.edaboard.com/showthread...-Z11-ZM-and-ZP-in-calculating-input-impedance
https://www.edaboard.com/showthread.php?168947-Plotting-inductance-from-Z(im)-Cadence-calculator
https://www.edaboard.com/showthread...-plot-of-L-vs-freq-of-an-inductor-(SpectreRF)
I mentioned it as reactance as a general case but I know it is mostly capacitance. How do I find input/output capacitance of a gain stage/MOSFET/Network?. Usually it is the imaginary part of the total input/output impedance. So If I do SP simulation and plot the imaginary part of ZP from direct plot, It will give me the input/output capacitance of a gain stage. Correct? But why do some people use YP from direct plot for this purpose. I just want to know which parameter to use (Say ZP) and what modifications I should make if I use the other parameters(Say YP).
P.S I know if the network has series connection it is easier to use Z parameters and If it is parallel connections it is easier to use Y parameters. But If we consider the network as a block box we wouldn't know how the connections are inside.