Transistor Amplifier

Transistor Amplifiers operate using AC signal inputs which alternate between a positive value and a negative value so some way of “presetting” the amplifier circuit to operate between these two maximum or peak values is required. This is achieved using a process known as Biasing.

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Detailed Description for Transistor Amplifier

An electrical signal can be amplified by using a device which allows a small current or voltage to control the flow of a much larger current from a dc power source. Transistors are the basic device providing control of this kind. There are two general types of transistors, bipolar and field-effect. Very roughly, the difference between these two types is that for bipolar devices an input current controls the large current flow through the device, while for field-effect transistors an input voltage provides the control.

Transistor Amplifiers operate using AC signal inputs which alternate between a positive value and a negative value so some way of “pre-setting” the amplifier circuit to operate between these two maximum or peak values is required. This is achieved using a process known as Biasing. Biasing is very important in amplifier design as it establishes the correct operating point of the transistor amplifier ready to receive signals, thereby reducing any distortion to the output signal.

Descriptions:

·         Study of the basic circuit of a RC Coupled Amplifier.

·         Frequency response of RC Coupled Amplifier.

·         Effect of negative feedback on the gain and frequency response of the amplifier

·         Effect of positive feedback on the gain and frequency response of the amplifier.

·         Verification of the condition of oscillation.

·         Study of different classed of amplifier.

 

 


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