D 8.23 The MOSFETs in the current mirror of Fig. 8.12(a) have equal channel lengths, μnCox = 400 µA/V2 and V/µm. If the input bias current is 200 µA, find W1, W2, and L to obtain a nominal short-circuit current gain of 4, an input resistance of 500 Ω, and an output resistance of 20 kΩ. What is the expected error in the current transfer ratio due to channel-length modulation?
20 μm; 80 μm; 0.8 μm; −0.6%