Improved passive Rb atomic frequency standard servo control method and servo control circuit

Abstract

The invention discloses a modified passive typed rubidium atom frequency scale servo controlling method and servo control circuit, which is characterized by the following: gathering and processing the quantum frequency discriminating signal through servo mode according the four double frequency modulating signal; judging the frequency of the microwave polling signal within the locking scale of atom adsorbing line breadth or at release locking condition; utilizing quantum correcting information to repair the frequency value of synthetic modulating signal; realizing the seal locking of entire machine. The invention adopts digital DDS and processor chip to integrate atom frequency marking servo part and synthetic part organically, which modifies the present miniaturized circuit structure to realize the seal locking of entire machine.

Description

technical field [0001] The invention belongs to the technical field of passive rubidium atomic frequency standard, and in particular relates to a passive rubidium atomic frequency standard servo, a miniaturization of integrated circuit and a method for improving the servo function for solving the unlocking problem. Background technique [0002] In the passive rubidium atomic frequency standard, the physical system is the core component of the entire atomic frequency standard, which provides an atomic resonance absorption line with stable frequency and narrow linewidth. After comprehensive modulation, the modulated microwave interrogation signal from the quartz crystal oscillator generated by the electronic circuit acts on the physical system. After quantum frequency discrimination, the quantum frequency discrimination information is processed by the servo circuit, and finally the output of the local oscillator is The frequency is locked on the center frequency of the ground-...

AI Technical Summary

Problems solved by technology

When the microwave interrogation signal is within the range of the atomic absorption linewidth, this method is ideal, but in practical applications, due to the different types of local oscillators and temperature coefficients selected, when the rubidium atomic frequency standard fails to replace the local oscillator , and each time the power is turned on in different environments, the output frequency of the local oscillator itself is not fixed each time, which sometimes causes the frequency of the microwave interrogation signal preset by the electronic circuit to be far from the peak frequency of the atomic resonance absorption peak If the distance is too far, it will take longer for the existing servo circuit to realize the closed-loop locking of the whole machine, and it may even make the whole atomic frequency standard machine unable to realize the closed-loop locking normally.

Images