Find the operating region of NPN transistors with the follow

Find the operating region of NPN transistors with the following terminal voltages: a. V_B = 2 V, V_E = 1.3 V, V_c = 2 V. b. V_B = 4 V, V_E = 3.3 V, V_C = 3.5 V. c. V_B = 4 V, V_E = 3.7 V, V_c = 6.2 V.

Solution

if E<B>C thenTransistor in Saturation

if E>B<C  thenTransistor in Cuttoff

If E>B>C  thenTransistor in Reverse Active region

if E<B<C thenTransistor in Forward Active region;

a) VE<VB=VC, here the transitor is in the bondary betweetn Active region and Saturation region

b)VE<VB>VC, thenTransistor in Saturation

c)VE<VB<V6 then Transistor in Forward Active region;