488kHz signal generator and frequency divider circuit

Published:2011/6/18 21:49:00 Author:Nancy | Keyword: 488kHz, signal generator, frequency divider | From:SeekIC

1488kHz master oscillator uses quartz crystal resonator to stabilize frequency, the output is divided by the frequency divider to obtain three different square wave outputs which are 4kHz, 12kHz and 124kHz. Working principle:1488kHz master oscillator is shown as the circuit. Triode VT1, diode VD1, capacitor C1-C7 and related components form a capacitance connecting three point type oscillator circuit. The oscillating voltage is amplified by the amplifer composed by triode VT2-VT5 and related components. VT4 is emitter output which is featured with high input impedance, low output impedance, and increases the backward stage with load capacity and stabilize the forward stage oscillating signal. Transformer T outputs 1488kHz signal frequency after amplified.



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