12kHz signal generator
Source: InternetPublisher:ohahaha Keywords: Signal generator Updated: 2023/11/17
The 12kHz signal generator as shown in the figure consists of a crystal oscillator and an alarm circuit. The oscillator output amplitude is stable with a variation of <±0.26dB.
Component selection:
Transistor VT1, VT3: 9014, 65≤β≤115; VT2, VT4: 3DGl308, 60≤β≤85. Thermistor RT: RRW1-2 type. Quartz crystal SJT: BE42-12kHz. The variable device T uses ferrite MXD-2000, the magnetic core is GV36X22, L1-2Φ0.17mm high-strength enameled wire, wound with 57 turns, L3-4Φ0.17mm high-strength enameled wire, wound with 37 turns. The VD3 light-emitting diodes are available in any model. The nominal power of the resistors uses 1/8W metal film resistors. Other component parameter values are as marked in the figure, and there are no special requirements.
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