12kHz intermediate frequency signal generator

Published:2011/7/29 1:52:00 Author:Ecco | Keyword: 12kHz, intermediate frequency , signal generator | From:SeekIC

The circuit shown as the chart is composed of l2kHz intermediate-frequency oscillator and alarm circuit. It uses the variable feedback oscillation circuit, and its frequency is determined mainly by the quartz crystal. Cl, C2 can be used for fine tuning frequency. The oscillating tube adopts multiple-unit tube to increase the input impedance, the stability of magnitude could be gotten by bi-directional regulated voltage of VDl and VD2. Specifications: (1) Nominal frequency: 12kHz, the frequency difference does not exceed ± 1Hz; (2) Frequency Accuracy: In the temperature range of 25 ± 25 ℃, ΔF does not exceed ± lHz; (3) U01 output level: -28dB/600Ω, deviation is less than ± 0.2dB; (4) U02 output level: +4.5 dB ± 0.5dB.



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