2-48. What class of biasing does the RC
2-49. In an RC network, (a) what type of
impedance is presented and (b) does the
current lead or lag?
1. (a) Inductive
2. (a) Inductive
3. (a) Capacitive (b) lags
4. (a) Capacitive (b) leads
2-50. In the phase-shift oscillator, a phase shift
of 180 degrees for regenerative feedback
is provided by what minimum number of
2-51. What determines the phase angle of an RC
1. Input voltage
2. Output voltage
3. Values of resistance and inductance
4. Values of resistance and capacitance
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Figure 2D.Phase-shift oscillator.
IN ANSWERING QUESTIONS 2-52
THROUGH 2-56, REFER TO FIGURE 2D.
2-52. What is the maximum amount of phase
shift provided by Q1 in the figure?
1. 0 degrees
4. 180 degrees
2-53. What type of feedback is provided through
the RC networks to the base of Q1?
2-54. At any other than the desired frequency,
what type of feedback is provided by the
2-55. What components make up the frequency-
1. C1, C2, CE, R1, R2, RB
2. C2, C3, CE, R2, RB, RE
3. C1, C2, C3, R1, R2, RB
4. Cout, C1, C2, R1, R2, RE