multistage-1p - Multistage Amplifiers Cascade Connection AC...

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Multistage Amplifiers
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Cascade Connection
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AC Coupled Multistage Amplifiers The output of one amplifier is the input to the next amplifier. The overall gain: where or Note the DC bias circuits are isolated from each other by the coupling capacitors. The DC calculations are independent of the cascading. The AC calculations for gain and impedance are interdependent. 1 k k i L Z Z 1 k k o s Z Z n k v v v v v A A A A A 2 1
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FET Cascade Amplifier Voltage Gain: Input Impedance: Output Impedance:      2 1 1 2 2 1 2 || G D m D m v v v R R g R g A A A 1 G i R Z 2 D o R Z
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BJT Cascade Amplifier Voltage Gain: Input Impedance: Output Impedance:     1 2 1 1 2 2 2 1 2 4 3 ie ie C fe ie C fe v v v h h || R || R || R h h R h A A A 1 2 1 ie i h || R || R Z 2 1 2 oe C o h || R Z
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Combination of FET and BJT Cascade
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This note was uploaded on 05/25/2011 for the course ELECTRONIC 311 taught by Professor Umutsezen during the Fall '11 term at Hacettepe Üniversitesi.

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multistage-1p - Multistage Amplifiers Cascade Connection AC...

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