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Feedback Factor Formula:
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The feedback factor (β) of a feedback amplifier defines the fraction of the output signal that is fed back to the input. It is a crucial parameter that determines the overall performance and stability of the amplifier circuit.
The calculator uses the feedback factor formula:
Where:
Explanation: The feedback factor represents the ratio of the feedback signal to the output signal, determining how much of the output is returned to the input.
Details: The feedback factor is essential for determining amplifier gain, bandwidth, input/output impedance, and overall circuit stability. It helps in reducing distortion and improving frequency response.
Tips: Enter the input signal feedback value (can be voltage, current, or frequency) and the signal output value in millivolts. Both values must be positive numbers greater than zero.
Q1: What is the typical range of feedback factor values?
A: Feedback factor values typically range from 0 to 1, where 0 means no feedback and 1 means full feedback.
Q2: How does feedback factor affect amplifier stability?
A: Higher feedback factors generally improve stability but may reduce gain. Proper feedback factor selection is crucial to avoid oscillations.
Q3: Can feedback factor be greater than 1?
A: In most practical circuits, feedback factor is less than or equal to 1. Values greater than 1 may indicate measurement errors or special circuit configurations.
Q4: What units should I use for input and output signals?
A: Ensure consistent units - input can be in volts, milliamps, or hertz, while output should be in millivolts for proper calculation.
Q5: How does feedback factor relate to closed-loop gain?
A: Closed-loop gain (Acl) is related to open-loop gain (Aol) and feedback factor by: Acl = Aol / (1 + βAol).