Home
Class 12
PHYSICS
In a common emitter amplifier circuit us...

In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be:-

A

`180^@`

B

`45^@`

C

`90^@`

D

`135^@`

Text Solution

Verified by Experts

The correct Answer is:
A

`DeltaV_("CC") = DeltaV_(CE) + R_LDeltaI_C = 0`
or `DeltaV_(CE) =-R_LDeltaI_C`

The change in `V_(CE)` is the output voltage `v_0` From equation we get
`v_0=DeltaV_(CE) = -beta_(ac)R_LDeltaI_B`
The voltage gain of the amplifier is
`A_v=v_0/v_i=(DeltaV_(CE))/(rDeltaI_B)=-(beta_(ac)R_L)/r`
The negative sign represents that output voltage is opposite with phase with the input voltage.
Promotional Banner

Similar Questions

Explore conceptually related problems

Draw the circuit diagram of a common emitter amplifier using n-p-n transistor. What is the phase difference between the input signal and output voltage? State two reasons why a common emitter amplifier is preferred to a common base amplifier.

The phase difference between input and output voltage of a CE circuit is

In a common base ampifier , the phase difference between the input signal and output voltage is

In a common-base amplifier, the phase difference between the input signal voltage and output voltage is :

In a common emitter amplifier, the phase difference between the input signal voltage and output voltage is.

In a common emitter amplifier , the phase difference between the input signal voltage and output voltage is

In a common base transistor what is the phase relationship between input and output voltage

When a triode is used as an amplifier the phase difference between the input signal voltage and the output is