Question

A perfect diode is connected to an a.c. circuit (Fig. 111).

Determine the limits within which the voltage between the anode and the cathode varies.

Answer 1

Let us plot the time dependences U_ex, (t) of the external voltage, I_c (t) of the current in the circuit (which passes only in one direction when the diode is open), the voltage across the capacitor U_c (t), and the voltage across the diode U_a (t) (Fig. 225)

Therefore, the voltage between the anode and the cathode varies between 0 and - 2U₀.