Feedback Amplifier Topologies

Both voltage and current can be fed back to the input I/P in either series or parallel .The four ways of connecting the feedback to the signals are:

• Voltage Series Feedback Amplifier
• Voltage Shunt Feedback Amplifier
• Current Shunt Feedback Amplifier
• Current Series Feedback Amplifier

Voltage Series Feedback Amplifier

Given Below is the Block Diagram of the Voltage Series Feedback Amplifier

• The input voltage and the feedback are applied in series in a voltage series feedback amplifier. This kind of feedback is used to increase voltage gain, reduce distortion, and improve consistency.
• Feeds back some of the output voltage in series to improve precision. This controls gain, reduces distortion, and enhances the signal’s precision overall.
  

Voltage Shunt Feedback Amplifier

Given Below is the Block Diagram of the Voltage Shunt Feedback Amplifier

• In a voltage shunt feedback amplifier, the input voltage and the feedback are connected in parallel, or shunt . This type of feedback is used to increase voltage gain, enhance linearity, and decrease output impedance.
• Enhances stability by in parallel applying a portion of the output voltage to the input. As a result, performance is improved under a range of situations by increasing linearity and decreasing distortion.

Current Shunt Feedback Amplifier

Given Below is the Block Diagram of the Current Shunt Feedback Amplifier

• The feedback and input current are applied in series in a current series feedback amplifier. It is common practice for using this type of feedback to increase stability, input impedance, and bandwidth.
• Increases stability by running in parallel some of the output current. This improves linearity, lowers distortion, and gives the amplifier’s characteristics more control for reliable performance in a range of scenarios.

Current Series Feedback Amplifier

Given Below is the Block Diagram of the Current Series Feedback Amplifier

• The feedback in a current shunt feedback amplifier is linked in parallel, or shunt, to the input current. This arrangement is frequently used to increase bandwidth, stability, and input impedance.
• Increases control by series-firing a portion of the output current. This controls gain, guaranteeing precise amplification and reducing distortion for enhanced integrity of signals across a range for applications.

A Feedback amplifier is a type of electronic Circuit Where the output of the Signal is fed back to the input. This feedback loop allows the Amplifier to adjust its performance according to the output received which helps to improve the characteristics of the signal. Feedback Amplifiers are used in various electronic circuits such as Operational amplifiers, audio amplifiers, and various other electronic circuits.

In this Article, We will be going through Feedback Amplifiers, We will start our Article with an introduction of the Feedback Amplifier, then we will go through its types and Topologies, At last we will conclude our Article with its Advantages, Disadvantages and Some FAQs.