6- Q1 and Q2 transistors in the network given below are n-channel E-MOSFETs and have the same threshold voltages (that is, VTH1 = VTH2 = VTH ) but different K values. a) Calculate the gain of the network and comment on it. b) Explain the physical reason why the gate currents are taken zero. c) Comment on the role of Q1 transistor in the network.
Figure P9.48 Figure P9.49 For the amplifier in Figure P9.49, determine (a) the ideal closed-loop voltage gain, (b) the actual closed-loop voltage gain if the open-loop gain is Aod = 150,000, and (c) the open-loop gain such that the actual closed-loop gain is within 1 percent of the ideal.
Required information Consider the instrumentation amplifier shown in the figure where the op amps are ideal. Find the values of currents i1, i2, and i3 of the given amplifier if va = 5.02 V and vb = 4.98 V? The values of currents i1, i2, and i3 of the given amplifier are listed below: i1 = μA (Round the final answer to two decimal places and include a minus sign if necessary.) i2 = μA (Round the final answer to the nearest whole number and include a minus sign if necessary.) i3 = μA (Round the final answer to two decimal places and include a minus sign if necessary.)
An NMOS transistor having Vt = 1 V and kn = 1.0 mA/V2 is operating in the amplifier circuit shown. The DC node voltages at all nodes are indicated on the circuit diagram. Assuming the amplifier is operating linearly in the mid-band frequency range, determine the value of the small-signal Thevenin's equivalent output resistance, RO = vX/iX (with vsig = 0). a. 3 kΩ b. 1 kΩ c. 2 kΩ d. 4 kΩ e. 5 kΩ