Temperature-compensating method for quartz crystal oscillator
A technology of quartz crystals and oscillators, which is applied in the electronic field, can solve the problems of narrow series-parallel frequency interval, reduce the frequency multiplication times of the volume, and cannot adapt to the development trend of high frequency, etc., and achieve the effect of suitable integration and overcoming phase jitter
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[0041] According to the method of the present invention, we form a kind of 100MHz, 5 overtone temperature compensated crystal oscillators, its schematic diagram is as Figure 4 shown.
[0042] exist Figure 4 middle,
[0043] The quartz crystal oscillator is composed of R1, R2, R3, R4, C1, C2, C3, C4, NPN transistor, 5th overtone quartz crystal with a natural frequency of 100MHz, +5V power supply and other devices;
[0044] The mixer is composed of two diodes DIODE, two transformers TRANS3 and other devices;
[0045] The filter is composed of C5, C6, 5th overtone quartz crystal with a natural frequency of 100MHz;
[0046] The whole wave circuit is composed of C7, C8, C9, INDUCTOR1, INDUCTOR2, INDUCTOR3 and other devices;
[0047] Compensation frequency generating circuit is constituted by ADμ814; among them, ADμ814 is a microprocessor with a temperature sensor, which can generate a compensation frequency signal through software programming.
[0048] The value range of the...
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