ece137a_ps5_2008

ece137a_ps5_2008 - ECE137A Problem set #5 Problem 1 The...

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1 ECE137A Problem set #5 Problem 1 The transistors Q1 and Q2 have beta=50 and Va=50 V, Vcc= +5 Volts, Rgen=1 kOhm, RL=1 kOhm. Bias Q1 at 1 mA collector current, Q2 at 5 mA collector current, bias the emitter of Q2 at 4V, the Q2 collector at 1 V, and the Q1 emitter at 1 V. The parallel combination of Rb1 and Rb2 is to be 10 kOhm. (a) Find all unspecified resistor values. (b) Find the small signal gain and the input impedance of Q2 (Vc2/Vb2) and Rin2 (c) Find the small signal gain and the input impedance of Q1 (Vc1/Vb1) and Rin1) (d) Find the input impedance *** of the amplifier **** , Vin/Vgen, Vout/Vin, and Vout/Vgen Problem 2 Q1 Q2 Q3 Q4 Q5 +Vdd -Vss Vgen Rgen Rg1 Rd2 Rd5 Rg5a Rg5b RL Rd4 The NMOS FETS have 1.2 nm oxide thickness, 250 nm gate length, and a 0.4 V threshold. Mobility is 400 cm^2/(V-s). λ =0 1 V . The PMOS FETs are the same, except have -0.4 V threshold and 200 cm^2/(v-s) mobility. All FETs are to operate with |Vgs|=0.6 V, the Id3=Id4=2 mA , Id5=1 mA. The supplies are +/- 2 V.

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This note was uploaded on 08/06/2008 for the course ECE 137AB taught by Professor Rodwell during the Winter '08 term at UCSB.

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ece137a_ps5_2008 - ECE137A Problem set #5 Problem 1 The...

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