Question 1
- Sketch the frequency determining circuit of the following oscillators:
(i) an LC oscillator;
(ii) an RC oscillator.
(b) List two:
(i) LC oscillators;
(ii) RC oscillators.
The requirement here is that of showing the frequency determining circuits of LC and
RC oscillators.
The expected answers were:
(a) (i) LC oscillators
(ii) RC oscillators
(b) (i) LC oscillators
- Tuned collector oscillator
- Hartley oscillator
- Colpitts oscillator
(ii) RC oscillators
- Phase shift oscillators
- Wien bridge oscillators
- Multivibrators
- -Twin Tee
No candidate gave the required diagram, only a very few listed some of the
oscillators.