Inductor and Diode [Enigmas, etc.]

A diode works for battery charging, as shown in Figure 1 . When we use an RF source excitation, the wiring inductance L matters. Let us consider how affects turn-on and -off operation. The voltage xmlns:xlink="http://www.w3.org/1999/xlink">vs ( xmlns:xlink="http://www.w3.org/1999/xlink">t ) is assumed to have a symmetric triangle waveform of 250 MHz peaking at 100 V, illustrated rid="fig2" 2 , while holds constant 48 V regardless its charging current. problem find xmlns:xlink="http://www.w3.org/1999/xlink">vD ). Among four candidates proposed rid="fig3" 3 which one does look like?