12kHz signal generator circuit

Published:2011/8/6 22:21:00 Author:nelly | Keyword: signal generator | From:SeekIC

The 12kHz signal generator as shown is composed of crystal oscillator and alarm circuit. The output amplitude of the oscillator is stable, change <±0.26dB. Component selection: transistor VTl, VT3: 9014,65 ≤ β ≤ 115; VT2, VT4: 3DGl308, 60 ≤ β ≤ 85. Thermistor RT: RRWl-2 type. Quartz crystal SJT: BE42-12kHz. Transformer T applies the ferrite MXD-2000, and the magnetic core is GV36X22. Ll-2Φ0.17mm high strength wire, wound 27 turns, L3-4Φ0.17mm high strength wire, wound 37 turns. The LED VD3 can be any type.



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