AC Analysis of FET Circuits

Frequency Response of FET Amplifier

Frequency Response of FET Amplifier: Low-Frequency Response – The low Frequency Response of FET Amplifier circuits is determined by exactly the same considerations as for BJT circuits. The lower cutoff frequency is normally set by a source bypass capacitor, and it can be affected by coupling capacitors. High Frequency Response: Unlike BJTs, a device cutoff …

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FET Common Source Amplifier with Unbypassed Source Resistors

FET Common Source Amplifier with Unbypassed Source Resistors: Equivalent Circuit – When an unbypassed source resistor (RS) is present in a FET Common Source Amplifier circuit, as shown in Fig.11-10(a), it also appears in the ac equivalent circuit, [Fig. 11-10(b)]. In the complete equivalent circuit RS must be shown connected between the FET source terminal …

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