Electronic Circuit Analysis

88 Electronic Circuit Analysis
19. Phase angle and frequency
20. Cm=C(l-A)
21. (hfe~
22. Leakage current is more
23. Very high
24. CE-CB
25. Large voltage and current gains
26. If the 04tput waveform is not the replica of the input waveform, it is called distortion.
27. (i) Non linear c1istortion : If harmonic frequencies are generated at the o/p, it is called non
linear or amplitude distortion.
(ii) Freqeuncy distortion: If different frequency components are amplified differently, it is
called frequency distortion.
(iii) Phase distortion: If the output is shifted by different phased each time, it is called phase
distortion.
28. Low frequencies - high pass filter.
High frequencies - low pass filter.
29. Output stage - CC
Intermediate stage - CE
30. CC-CC cascade is called Darlington pair.
Significance: (i) It has very high input impedance. (ii) It behaves life a constant current source.
3 1. It decreases.
32. To decrease the loss in gain due to negative feedback
33. The tilt is more
34. Interacting and non interacting.
35. If the input impedance of next stage loads the previous stage, it is calleajnteracting stages. If
the input impedance of next stage does not load the previous stage, it is called non interacting
stage.
f
36. A =~.J /
2 1n -1
37. IH = f .J21/n-1
38. IH = 0.94 / D •
39. 6n dB/octave or 20n dB/decade.
40. For high gain.