In the circuit shown below, four silicon diodes and four capacitors are connected to a sinusoidal voltage source of amplitude Vin > 0.7 V and frequency 1 kHz. If the knee voltage for each of the diodes is 0.7 V and the resistances of the capacitors are negligible, the DC output voltage Vout after 2 seconds of starting the voltage source is closest to
1
4Vin - 0.7 V
2
4Vin - 2.8 V
3
Vin - 0.7 V
4
Vin - 2.8 V