What is power amplifier discuss all of its types?
Power amplifier are the basic category of amplifiers which is used to amplify the power of the input signal which may be either a digital signal or an analog signal from few milli watts to several milli watts depending on the need of amplification.
Why do we use power amplifier?
The function of a power amplifier is to raise the power level of input signal. It is required to deliver a large amount of power and has to handle large current. The base of transistor is made thicken to handle large currents.
How is the circuit of a power amplifier designed?
In multiple ways, the circuit of the power amplifier can be designed. Each circuit design possesses different characteristics as well as it produces various outputs. So to differentiate these amplifiers the classification is done in the alphabetical order.
How are transistors used in a power amplifier?
To overcome the drawback of the unnecessary heating of the device class B circuit of the power amplifier was designed. Rather than using the single transistor, in this circuit it is designed with the help of the two transistors ( one NPN and other PNP) that complement each other.
How is an input signal sent to a power amplifier?
The input signal to a power amplifier needs to be above a certain threshold. So instead of directly passing the raw audio/RF signal to the power amplifier, it is first pre-amplified using current/voltage amplifiers and is sent as input to the power amp after making necessary modifications.
How are power amplifiers used in the real world?
In this case of amplifiers, the magnitude of the applied power tends to increase. Hence these amplifiers are used in various applications where the power requirement is to drive the load. The amplifiers are classified based on the applied signals either it is the voltage signal or the power signal.