TUGAS SELFTEST ELEKTRONIKA TELEKOMUNIKASI HALAMAN 107-108

12. Linear power amplifiers are used to raise the power level of Low Level AM and SSBSignals.
13. A Mosfet power amplifier is used to increase the power level of an FM signal.
14. Linear power amplifier operate class A,B, and AB
15. A class A transistor power amplifier has an efficiency of 50 percent. The output power is               27W. The power dissipated in the transistor is 13.5 W
16. Class A amplifier conduct for 360 degrees of a sine wave input.
17. True or false. With no input, a class B amplifier does not conduct. FALSE
18. Class B RF power amplifiers normally used a(n) Broadband configuration.
19. A class C amplifier conducts for approximatly 90 degrees to 150 degrees of the input signal.

20. In a class C amplifier, collector current flows in the form of positive pulses.
21. In a class C amplifier, a complete sinusoidal output signal is produced by a(n) Timed Circuit.
22. The efficiency of a class C amplifier is in the range of 60 to 85 percent.
23. The tuned circuit in the collector of a class C amplifier acts as a filter to eliminate Induced Voltage.
24. A class C amplifier whose output tuned circuit resonates at some integer multiple of the input frequency is called a(n) Flywheel effect.

25.    Frequency multipliers with factors of 2, 3, 4, and 5 are cascaded. The input is 1.5MHz. The output is 120 MHz.

26.    A class C amplifier has DC supply voltage of 28 V and an average collector current of 1.8A. The power input is 50.4 W.