12kHz IF signal generator circuit

Published:2011/8/6 21:33:00 Author:nelly | Keyword: IF, signal generator | From:SeekIC

As shown in the picture, the circuit is composed of the IF oscillator and alarm circuit. It applies the variable feedback oscillator circuit, and the oscillator frequency is mainly determined by the quartz crystal. C1 and C2 can be used as the fine turning frequency. Oscillating pipe uses the composite pipe to improve the input impedance, and the stability of the magnitude is achieved by the VD1 and VD2 two-way regulation. Specifications: (1) Nominal frequency: 12kHz, and the frequency difference does not exceed ± 1Hz; (2) Frequency Accuracy: in the temperature range of 25±25℃, and ΔF does not exceed ± lHz; (3) U01 output level: -28dB/600Ω, deviation is less than ± 0.2dB;



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