hw4_sol_04-03-06-10-34

# hw4_sol_04-03-06-10-34 - sol.mcd Page 3 of 3 Problem 2...

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sol.mcd Page 3 of 3 L 160 µ m = L1 0 W := W1 6 µ m = W σ dW σ dR_R := σ dR_R σ dW W = R R W W = ... R 2 R sq L W W 2 = R 1 R sq L W W 2 + = σ dR_R 1.25 10 3 × = σ dR_R 0.2% k := σ dW 20nm := k 1.6 := ... 89% Problem 2: Resistor Matching

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hw4_p3_sol.mcd Page 1 of 1 Lot's of possibilities for startup circuits. This one is simpler than the one shown in the class lectures. Tradeoff: may be that it's hard to turn M1S completely off, especially for low VDD. You of course can invent your own, a small area to be creative in. M2 M1 M4 M3 R VDD m M1S RS M2S Note: Size M2S and RS such that Vgs(M2S) < Vgs(M2) Make M1S weak or it's (W/L) << 1. Start up circuit Loop 1 solving for gm1 we get: 2I D gm 2 D gm 1 RI D 2m

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## This note was uploaded on 08/01/2008 for the course EECS 240 taught by Professor Boser during the Spring '04 term at Berkeley.

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hw4_sol_04-03-06-10-34 - sol.mcd Page 3 of 3 Problem 2...

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