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Quartz_stabilized_bridge_oscillator_with_sine_wave_output

2016-05-16 20:03  
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Quartz_stabilized_bridge_oscillator_with_sine_wave_output
Figure-26 shows a crystal-controlled bridge-based oscillator, where one leg of the bridge is formed by a lamp(a classic circuit).Figure 4-27 shows the waveforms,As the oscillation amplitude builds, the lamp current increases, as does lamp resistance. This causes a reduction in gain, and the circuit finds a stable operating point, The 15-pF capacitor suppresses Spurious oscillation. The amplifier output(trace A, Fig,4-27)is a sine wave without about 1.5%distortion(trace B),caused primarily by common-mode swing,LINEAR TECHNOLOGY,APPLICATION NOTE 43,P. 28.