The diodes in Figure 1 are ideal. Find the voltage V and current I with R1 = 4 k

Question

The diodes in Figure 1 are ideal. Find the voltage V and current I with R1 = 4 kOhm, R2 = 2kOhm, and R3 = 1 kOhm. Find the voltage V and current I with R1 = 1 kOhm, R2 = 2 kOhm, and R3 = 4 kOhm. Calculate the small-signal resistances rd1 and rd2 for any forward biased diodes in parts (a) and (b). Use the constant-voltage-drop model for the diodes in Figure 2 with VD.on = 0.8 V. Find the voltage V and current I with R1 = 3 kOhm and R2 = 2 kOhm. Find the voltage V and current I with R1= 2 kOhm and R2 = 3 kOhm. Calculate the small-signal resistances rd1 and rd2 for any forward biased diodes in parts (a) and (b).

Explanation / Answer

1) a)v+10 = I*R3 ideal diode offers no resistance so V= -5v 5 = I (1) I = 5mA b)V = -5v 5 = I*4 I = 1.25 mA c) rd1 = 0 rd2 = 0

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