The ac schematic of an NMOS common-source stage is shown in the figure below, where part of the biasing circuits has been omitted for simplicity. For the n -channel MOSFET M, the transconductance g_m = 1 mA/V, and body effect and channel length modulation effect are to be neglected. The lower cutoff frequency in Hz of the circuit is approximately at

In the circuit shown below, the silicon npn transistor Q has a very high value of $$\beta $$. The required value of R₂ in k$$\Omega $$ to produce I_c = 1mA is

In a voltage-voltage feedback as shown below, which one of the following statements is TRUE, if the gain k is increased?

In the circuit shown below the op-amps are ideal. Then V_out in Volts is