From Schaum's Outline of Theory and Problems of Electronic Communication, Second Edition

SOLVED PROBLEMS

1.

Refer to the block diagram in Fig. 2-20. If A V = 10 and B = 0.02, will the circuit oscillate? If not, calculate the required value of A V.


Figure 2-20

2.

Refer to Fig. 2-20. If A V = 150 and B = 0.01, will the circuit oscillate?

3.

Refer to Fig. 2-20. Assume B = -0.025. Calculate the value of A V required to satisfy the Barkhausen criterion.

4.

Assume in Fig. 2-20 that V out = 24 V p-p (volts peak-to-peak) and B = 0.01. Calculate A V and V in.

5.

Refer to Fig. 2-21. Assume L 1 = 496.67 H and L 2 = 9.93 H. Calculate the following: ( a) f osc; ( b) the feedback fraction B; ( c) , , and ; ( d) X T (net reactance) of the L 2 C 3 branch.


Figure 2-21

6.

Refer to Fig. 2-21. Assume that it is desired to obtain an oscillating frequency of 500 kHz. If , calculate: ( a) L T; ( b) L 1 and L 2; ( c) , , and ; ( d) X T of the L 2 C 3 branch.

7.

Refer to Fig. 2-22. If C 1 = 14.54 pF and C 2 = 435.27 pF, calculate...


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