kawal_547

 Profile Answers by kawal_547 

• Dec 14th, 2008

 

In power amplifier feedback employed is current feedback and In voltage amplifier, voltage feedback is employed.

ana_m

 Profile Answers by ana_m 

• Jan 24th, 2009

 

Power amplifiers basically amplify both current and voltage (p=v*i).
Voltage amplifiers only amplify the voltage.

Nishant

• Sep 2nd, 2014

 

• Voltage amplifiers have a high voltage gain, while power amplifiers have a high power gain.

• In most voltage amplifiers, current gain is very low, while power amplifiers have a significant current gain, which results the power gain.

• Voltage amplifiers dissipate relatively less heat than power amplifiers. Therefore, voltage amplifiers have higher power efficiency than power amplifiers. Also, power amplifiers
require additional cooling mechanism due to this fact.