frequency-response curve. The upper and lower limits of the band of frequencies for which the amplifier is most effective. A3. (A) f2 = 80 kHz, f1 = 30 kHz, BW = 50 kHz(B) f2 = 4 kHz, f1 = 2 kHz, BW = 2 kHz A4. The capacitance and inductance of the circuit and the interelectrode capacitance of the transistor. ">
ANSWERS TO QUESTIONS Q1. THROUGH Q42.
A1. The difference between the upper and lower frequency limits of an amplifier.
A2. The half-power points of a frequency-response curve. The upper and lower limits of the
band of frequencies for which the amplifier is most effective.
A3. (A) f2 = 80 kHz, f1 = 30 kHz, BW = 50 kHz(B) f2 = 4
kHz, f1 = 2 kHz, BW = 2 kHz
A4. The capacitance and inductance of the circuit and the interelectrode capacitance of
A5. Negative (degenerative) feedback.
A6. It decreases.
A7. It increases.
A8. The capacitance of the circuit.
A9. Peaking coils.
A10. The relationship of the components to the output-signal path.
A11. Combination peaking.
A12. The coupling capacitor (C3).
A13. A shunt peaking coil for Q2.
A14. A decoupling capacitor for the effects of R2.
A15. A part of the low-frequency compensation network for Q1.
A16. A series peaking coil for Q1.
A17. A swamping resistor for L2.
A18. L1, L2, and R5.
A19. R9 and C5.
A20. The gain increases.
A21. The gain decreases.
A22. To provide maximum impedance at the desired frequency.
A24. By changing the value.
A25. Transformer coupling.
A26. It uses fewer components than capacitive coupling and can provide an increase in
A27. A step-down transformer.
A28. A too-narrow bandpass.
A29. By using an optimumly-coupled transformer.
A30. Low gain at the center frequency.
A31. A swamping resistor in parallel with the tuned circuit.
A32. RF transformers are used and the transistor is neutralized.
A33. Degenerative or negative.
A34. By neutralization such as the use of a capacitor to provide regenerative (positive)
A35. C2 and the secondary of T1.
A36. R1 provides the proper bias to the base of Q1 from V BB.
A37. R2 provides the proper bias to the emitter of Q1.
A38. The output would decrease. (C4 decouples R2 preventing degenerative feedback from
A39. C5 and the primary of T2.
A41. The dotted lines indicate that these capacitors are "ganged" and are tuned
together with a single control.
A42. C3 provides neutralization for Q1.
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