The figure below shows a circuit and its input voltage v_ i as function of time t . Assuming the diodes to be ideal, which of the following graphs depicts the output voltage v₀ as function of time t?

Step-by-step solution

V ₀= V _ i when no current flow through 1 k for negative values of V _ i i from D₁=0 (always) i from D₂=0 upto 3 V So from 0 to -3 V V_ i =V₀ from -3 to -4 V₀=-3 V For positive values of V i from D₁=0 upto 1 V i from D₂=0 (always) Hence 0 to 1 ~V 1 to 4 ~V V₁=V₀V₀=1 volt Correct graph is (A)