# hw1 - (a(b and(d Provide the circuit schematic with DC bias...

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ECEN 326 HOMEWORK #1 ( Due date: Monday February 8, 2010) 1. Derive G m and R n for the following circuits. (a) (b) (c) (d) v i R B R C R E v o R X v o v i R B R C R E R X v i R G R S R D R X v o v o v i R G R S R D R X 2. For the circuit below, assume that β = 100 and V T = 25 mV . (a) Find the DC collector currents of all transistors. Verify all your assumptions. (b) Find the maximum unclipped output signal amplitude. (c) Find the AC small-signal gain ( v o /v i ), the input resistance ( R i ), and the output resistance ( R o ) for V A,npn = V A,pnp = . (d) Repeat part (c) for V A,npn = 75 V and V A,pnp = 20 V . (e) Simulate the circuit using Pspice (use Q2N3904 and Q2N3906 transistors) and verify the results in parts
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Unformatted text preview: (a), (b) and (d). Provide the circuit schematic with DC bias points annotated, and AC/transient plots showing your measurements. Q 1 Q 4 +-V i 1k R S 2k R 3 150 R 5 C 1 1k R 8 Q 2 Q 3 750 R A 25 R C 1k R 4 1k R 9 1k R B C 2 C 3 17k R 2 33k R 1 10.8k R 7 9.2k R 6 C 4 600 R L +5 +5 +5 +5 +5 V o 8 R o R i...
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