The source follower amplifier provides lower output impedance and essentially unity
Chapter 0, Problem P2.20(choose chapter or problem)
The source follower amplifier provides lower output impedance and essentially unity gain. The circuit diagram is shown in Figure P2.20(a), and the small-signal model is shown in Figure P2.20(b).This circuit uses an FET and provides a gain of approximately unity. Assume that R2 R] for biasing purposes and that Rg R2. (a) Solve for the amplifier gain, (b) Solve for the gain when gm = 2000 (tl and Rs = 10 kil where Rs = Ry + R2. (c) Sketch a block diagram that represents the circuit equations.
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