2-33 Figure 2-29.—Shunt-fed Hartley oscillator with buffer amplifier. Q-22. What is the frequency that is twice the fundamental frequency? Q-23. What is the purpose of the buffer amplifier? SUMMARY This chapter has presented information on oscillators. The information that follows summarizes the important points of this chapter. WAVE GENERATORScan be classified according to the SINUSOIDAL or NONSINUSOIDAL waveforms produced. SINUSOIDAL WAVE GENERATORS(oscillators) produce a sine wave of constant amplitudeand frequency. There are three ways to control the frequency of sine-wave generators: (1) RC NETWORKS, (2) LC NETWORKS, and (3) CRYSTALS. NONSINUSOIDAL WAVE GENERATORS(oscillators) generate complex waveforms such as SQUARE WAVES, RECTANGULAR WAVES, SAWTOOTH WAVES, TRAPEZOIDAL WAVES, and TRIGGERS. Nonsinusoidal wave generators are often called RELAXATION OSCILLATORS. A BASIC OSCILLATOR can be thought of as an amplifier that provides itself with a signal input.
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
