Consider the bridge circuit and diff-amp described in Problem 11.27. The BJT diff-amp is to be replaced with a MOSFET diff-amp as shown in Figure 11.19. The transistor parameters are VTN = 0.4 V, Kn= 1 mA/V2, and λ = 0. The bias voltages of the MOSFET diff-amp are V+ = 5 V and V− = −5 V, and the reference current is IQ = 0.2 mA. Let RD = 20 kΩ. Terminal A of the bridge circuit is to be connected to the gate of M1 and terminal B is to be connected to the gate of M2. (a) Determine the range of output voltage vo as δ changes, (b) Explain the advantages and disadvantages of this circuit configuration compared to that in Problem 11.27.
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