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I am currently solving a problem involving shunt series-series feedback. So far this is what I can say about the circuit:

- Series mixing is feedback combined with source

- Negative voltage feedback samples output voltage

- Series voltage feedback stabilises close loop gain and should be used to get precise voltage gain

- Negative feedback has disadvantage of reducing gain of amp but can be overcome by extra stages of amplifier

- Advantages are stabilises gain, reduction in nonlinear distortion, reduction in noise and also controls input and output impedance

- Unwanted noise coming from power supply, coupling of signals from other circuits, feedback can only reduce thermal and shot noises

- In voltage feedback input terminals of the feedback network are in parralel with the load and output voltage appears at the input terminal of feedback

- A way to test for voltage feedback is to see if signal vanishes as short circuit

- As series voltage feedback stabilises close loop voltage gain it is good for designing amplifiers with precise voltage gainse

- Negative feedback factor is larger than unity therefore negative series feedback increases input impedance

- Negative voltage feedback reduces output impedance

Can anyone else help me out, what else can I add and say about this feedback network?

The link to the problem is as follows:

http://www.angelfire.com/electronic2/helpneed/index.html

Please help!!!

Thanks!

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# Help Needed On Feedback

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