Consider the small-signal analysis circuit of a diode.
Which of the following statements is/are correct regarding the equivalent circuit of a diode?
1
When V and Vs are non-zero, the diode can be replaced with a resistor and a capacitor in series.
2
When V and Vs are non-zero, the diode can be replaced with a resistor and a capacitor in parallel.
3
When V = 0, the diode can be replaced with a resistor and a voltage source in series.
4
When V = 0, the diode can be replaced with a capacitor