Editing Transconductance (section)

== Transresistance ==

'''Transresistance''' (for '''transfer resistance'''), also infrequently referred to as '''mutual resistance''', is the [[Duality (electrical circuits)|dual]] of transconductance. It refers to the ratio between a change of the voltage at two output points and a related change of current through two input points, and is denotated as {{math|''r''<sub>m</sub>}}:
: <math>r_\text{m} = \frac{\Delta V_\text{out}}{\Delta I_\text{in}}</math>

The SI unit for transresistance is simply the [[ohm (unit)|ohm]], as in resistance.

'''Transimpedance''' (or, '''transfer [[Electrical impedance|impedance]]''') is the AC equivalent of transresistance, and is the [[Duality (electrical circuits)|dual]] of transadmittance.