A kind of crystal oscillator anti-vibration compensation device and method based on binary code
A technology of crystal oscillators and binary codes, applied in power oscillators, automatic control of power, electrical components, etc., can solve the problems of low precision of AVXO, achieve simple compensation structure, easy integration and mass production, and simple compensation process Effect
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Embodiment 1
[0045] The embodiment of the present invention provides a crystal oscillator anti-vibration compensation device based on binary coding, such as figure 1 As shown, it includes a voltage-controlled crystal oscillator, a power divider, a microprocessor (MCU), a frequency-to-voltage conversion circuit, a signal adjustment circuit and a filter that are sequentially connected and form a closed-loop structure.
[0046] The voltage controlled crystal oscillator is used to generate a stable oscillation frequency signal and output it to the power divider.
[0047] The power divider is used to divide the output signal of the voltage-controlled crystal oscillator into two channels, one of which is used as the output signal of the anti-vibration compensation device of the crystal oscillator, and the other is output to the microprocessor.
[0048] The microprocessor is used to acquire the nominal frequency f of the VCO 0 and real-time output frequency Compare the frequency change Simul...
Embodiment 2
[0055] The embodiment of the present invention provides a method for anti-vibration compensation of a crystal oscillator based on binary coding, such as image 3 shown, including the following steps S1-S8:
[0056] S1. Under non-vibration conditions, the voltage control voltage V is applied to the voltage control terminal of the voltage controlled crystal oscillator c0 , so that it outputs the nominal frequency f 0 , and use the microprocessor to collect the nominal frequency f 0 .
[0057] S2, according to the nominal frequency f 0 , the binary code of the output frequency of the voltage-controlled crystal oscillator under the vibration condition is established by the microprocessor with frequency change Correspondence table of
[0058] Step S2 includes the following sub-steps S21-S24:
[0059] S21. Change the vibration condition of the voltage-controlled crystal oscillator so that its vibration acceleration is Collect the real-time output frequency of the voltag...
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