Analysis of a FET amplifier - Maple Application Center
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Analysis of a FET amplifier

: Tory Vaughan
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In this worksheet we derive the high and low 3dB frequencies of a single stage Field Effect Transistor (FET) amplifier in a Common Source configuration. The stage consists of the input voltage (Vvs) in series with a resistance (R1- the voltage source's resistance) feeding the FET through a coupling capacitor (C1). The resistor R2 is across the gate to source terminals of the FET and determines the input resistance. Capacitor C2 is the gate to drain capacitance of the FET. The amplification factor for the FET is mu. R3 is the drain to source resistance of the FET. C3 is a coupling capacitor connecting the output of the FET to the load resistance (R4). The complex frequency variable is s. V1, V2, V3, V4, and Vo are the node voltages for the circuit. The Miller approximation will not be used showing the power of Maple to solve a system of equations and allowing us to obtain the exact frequency response of the FET.

Application Details

Publish Date: June 19, 2001
Created In: Maple 9.5
Language: English



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