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Unformatted text preview: i D = I Dss (1 – v GS /V p ) 2 where I Dss is the drain current when gate-to-source voltage (V GS ) is zero; and V p is a negative voltage called the Gate-Source Cutoff Voltage. I Dss and V p are defined in the Date Sheet. The output drain current is related to input gate-to-source voltage by the transconductance gain g m , where g m = -2 (I Dss /V p )(1 – V GS /V p ) (in units of mmhos) The circuit requires that R σ have a value of 2.2K. Measure and determine the Q-point ( , , D GS DS I V V ). Also, from the measured gain (v /v gs ), determine m g and compare to that given on Data Sheet (named forward transfer admittance). Hint: v o = - g m R D v gs , where v gs = v s [5.1K / (510K + 5.1K)] Prelab : Find the Q-point for the circuit in Fig. (1) assuming that F β =100....
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This note was uploaded on 01/12/2011 for the course ECE 310 taught by Professor Staff during the Summer '08 term at Ill. Chicago.
- Summer '08