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Find the voltage VA in the circuit shown in Fig. 3.13 (i). Use simplified model.

Find the voltage VA in the circuit shown in Fig. 3.13 (i). Use simplified model.

diode61482019922.png

Answers

Wilfred
- It appears that when the applied voltage is switched on, both the diodes will turn ?on?. But that is not so. When voltage is applied, germanium diode (V0 = 0.3 V) will turn on first and a level of 0.3 V is maintained across the parallel circuit. The silicon diode never gets the opportunity to have 0.7 V across it and, therefore, remains in open-circuit state as shown in Fig. 3.13 (ii).

Therefore, VA = 20 - 0.3 = 19.7 V
Wilfykil answered the question on August 14, 2019 at 08:37

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