Graph of input characteristic of common emitter amplifier is

Question

Graph of input characteristic of common emitter amplifier is (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

The input characteristics of common emitter amplifier is the curve between base current

I_{B}

and base-emitter voltage

V_{BE}

at constant collector-emitter voltage

V_{CE}

.

The input characteristics can be determined by the circuit shown in figure. Keeping

V_{CE}

constant (say at

0 V

), note the base current

I_{B}

for various values of

V_{BE}

.
Then, plot the readings obtained on the graph, taking

I_{B}

along Y-axis and

V_{BE}

along X-axis. This given the input characteristic at

V_{CE} = 0 V

. Following a similar procedure, a family of input characteristics can be drawn. These curves are similar to as shown in option (b )

Q. Graph of input characteristic of common emitter amplifier is