Figure 921
the Differential Amplifier in Fig $\left|V_{O V}\right|=0.2 \mathrm{~V}$ And Have Equal Early Voltage

Essay

Figure 9.2.1
The differential amplifier in Fig. 9.2.1 utilizes current-source loads and is biased with a modified Wilson current mirror. All transistors are operated at the same overdrive voltage $\left|V_{O V}\right|=0.2 \mathrm{~V}$ and have equal Early voltage, $\left|V_{A}\right|=4 \mathrm{~V}$ .
(a) Find the differential gain.
(b) Find the CMRR (in $\mathrm{dB}$ ) assuming that the
only mismatch is that between $g_{m 1}$ and $g_{m 2}$ with $\triangle g_{m} / g_{m}=0.01$ .
(c) If the Wilson mirror is replaced with a simple current mirror, what does the CMRR become?