- Draw and label the block diagram of an oscillator.
- State two conditions for oscillation to occur.
- State two advantages of negative feedback in an amplifier.
The expected answers were:
(a)
(b) Conditions for oscillation to occur
(i) The gain must be greater than 1.
(ii) The feedback signal must be in phase with the input signal
OR
(i) | Aβ | > 1
(ii) =
(c) Advantages of negative feedback
(i) Circuit stability
(ii) Reduction in distortion
(iii) Increase in bandwidth
(iv) Reduction in noise
(v) Gain stability
(vi) Causes changes in the values of input/output impedance
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