8.13 Determine which diodes are forward biased and
which are reverse-biased in the configurations shown
in Figure P8.13. Assuming a 0.7-V drop across each
forward-biased diode, determine the output voltage.
+5 V OK
OVOK
-10 V
D₁
D₂
D3
(b)
+5 V OK
-5 VOKH
+5 V OK
-5 VOKH
+15 V
R
O Vout
Q+5 V
D₁
D₂
D3
D4
(a)
R
Vout
-5 VOKH
+5 V OK
D₁
D₂
(c)
-10 V
R
O Vout