*9.90 (a) Sketch the circuit of a current-mirror-loaded MOS differential amplifier in which the input transistors are cascoded and a cascode current mirror is used for the load (b) Show that if all transistors are operated at an overdrive voltage VOV and have equal Early voltages VA , the gain is given by A d = 2VA/VOV2 Evaluate the gain for VOV =0.20 V and VA =10 V.

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