MULTISTAGE AMPLIFIERS

A cascaded amplifier stage is equivalent to____.

• common emitter stage followed by common base stage.

• common base stage followed by an emitter follower.

• an emitter follower stage followed by common base stage.

• common base stage followed by a common emitter stage

Which type of coupling produces minimum interference with frequency response?

• RC coupling

• transformer coupling

• direct coupling

• impedance coupling

In voltage amplifier, the load resistance_________.

• should be small as possible

• should be as large as possible.

• must be equal to output impedance

• must be half of output impedance

For an amplifier, the coupling method which gives highest gain in______.

• impedance coupling

• transformer coupling

• capacitance coupling

• resistance coupling

The coupling capacitor may affects_______.

• bandwidth

• lower cut off frequency

• higher cut off frequency

• both lower as well as higher cut off frequency

The source of harmonic distortion in RC coupled transistor amplifier is usually__________.

• power supply

• capacitor

• R-C circuit

• transistor

In a CE transistor amplifier, when collector emitter voltage increases______.

• the instantaneous operating point moves up the load line

• the instantaneous operating point moves down the load line

• none of themload current increases

In case of transistor amplifier the emitter resistance R_E is removed, then______.

• the gain of the amplifier will reduce

• heat sink will not be required.

• Q-point will be unstable

• base to emitter junction will be less forward biased.

The gain of a transistor amplifier falls at high frequencies due to the_________.

• internal capacitance of the device

• coupling capacitor at the input

• skin effect

• coupling capacitor at the output

What is the effect of cascading the amplifier stages?

• To increase voltage gain & increase the bandwidth

• To increase voltage gain & reduce the bandwidth

• To decrease voltage gain & increase the bandwidth

• To decrease voltage gain & reduce the bandwidth