“Amplifiers are used to increase the voltage and current of a weak signal to desired level.There are two types of amplifiers.They are given below. In DC amplifiers,if you increase the voltage of DC Signal then the current will drop.If you increase the current of DC signal,then the voltage will drop.You can’t amplify both the voltage and current of DC signal at same time using DC to DC amplifiers.DC amplifiers involves capacitors for boosting operation. AC amplifiers can increase the voltage and current both at the same time.AC amplifiers is used to amplify only AC signals,It can’t amplify DC signals.AC amplifiers involves transistors to increase the voltage and current of weak AC signals.AC amplifiers consists of three configurations.”