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Mutiple Output Crystal Oscillator Circuit

2014-11-07 03:40  
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Mutiple Output Crystal Oscillator Circuit
As shown in the figure is a multiple output crystal oscillator. It is mainly composed of 3 gates of Al, four resistances, two capacitances and a piece of crystal. R1 ~ R4 offset two inverters within the linear range, and they are connected between foot 4 and foot 1 of A1 by crystal SJT to provide the feedback loop. It will produce oscillation only on the fundamental frequency of the crystal. Choice of components: capacitance C1 is 15 p (fine-tuning capacitor). Resistance R1, R3 is 220 Ω, R2 is 560 Ω, R4 is 1.8 k Ω, R5 is 1 kΩ, and the nominal power is 1 / 8 W. Integrated circuit Al is 7404, A2 is 74 LS74, and A3 is 74 LS393. Quartz crystal SJT is SW60A-4096 kHz. Switch SA is KNX (1 x 3).