- #1

ntetlow

- 21

- 2

Hello,

attached are two screenshots showing a common emitter and the same with source voltage removes to find the input impedance.

How is it that resistors R1 and RC can be placed in parallel to work out the input and output impedances?

Examples i have seen only show straightforward instances of parallel resistances.

If possible can someone also knock up a spice simulation where I can see for myself the proof. t

attached are two screenshots showing a common emitter and the same with source voltage removes to find the input impedance.

How is it that resistors R1 and RC can be placed in parallel to work out the input and output impedances?

Examples i have seen only show straightforward instances of parallel resistances.

If possible can someone also knock up a spice simulation where I can see for myself the proof. t