Problem

Determine the level of Vo for each network of Fig. 2.157.FIG. 2.157

Determine the level of V_o for each network of Fig. 2.157.

FIG. 2.157

Solution 1

(a)

Refer to Figure 2.157(a) in the text book.

The potential difference between the diodes, is positive. So, the diodes are in forward bias.

The diode voltage for Silicon (Si) diode is 0.7 V

The diode voltage for Germanium (Ge) diode is 0.3 V

Draw the modified circuit diagram with diode equivalent voltages.

$C:\Users\sanyasinaidu\Desktop\a1q.jpg$

Apply Kirchhoff’s voltage law to calculate the current through the circuit.

Calculate the output voltage, .

Thus, the output voltage, is .

(b)

Refer to Figure 2.157(b) from the text book.

The potential difference between the diode, is positive. So, the diode is in reverse bias. Replace the diode with open circuit.

Draw the modified circuit diagram with diode equivalent voltages.

$C:\Users\sanyasinaidu\Desktop\2a.jpg$

The current through the circuit is,

Calculate the output voltage, .

Thus, the output voltage, is .

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