define mutual conductance with respect to field-effect transistors
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Mutual conductance, also known as transconductance, is a measure of the ability of a field-effect transistor (FET) to amplify electrical signals. It is defined as the change in drain current (I_D) divided by the change in gate-to-source voltage (V_GS) at a constant drain-to-source voltage (V_DS). It is typically expressed in units of siemens (S).
In an FET, the mutual conductance is determined by the properties of the channel material and the geometry of the device. It is a measure of how much the drain current changes in response to a change in the gate-to-source voltage, and is an important factor in determining the gain of the FET.
Overall, mutual conductance is a measure of the ability of an FET to amplify electrical signals and is determined by the properties of the channel material and the geometry of the device.