Response to the following:
In the circuit shown in Figure, I is a dc current and vs is a sinusoidal signal. Capacitors C1 and C2 are very large; their function is to couple the signal to and from the diode but block the dc current from flowing into the signal source r the load (not shown). Use the diode small-signal model to show that the signal component of the output voltage is
If vs = 10 mV, find vo for I = 1 mA, 0.1 mA, and 1 μA. Let Rs =1 Ω. At what value of I does vo become one-half of vs?
Note that this circuit functions as a signal attenuator with the attenuation factor controlled by the value of the dc current I.
