Device and method for controlling frequency source and frequency source

By designing a digital fast closed-loop circuit and a high-speed controller in the millimeter-wave frequency source, the problem of too long amplitude switching time in the existing technology is solved, the fast amplitude control of the frequency source is realized, and the switching requirements of agile signals are met. High accuracy is maintained otherwise.

CN114629457AActive Publication Date: 2022-06-14BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Patent Information

Application Number
CN202111654042.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2021-12-30
Publication Date
2022-06-14
Estimated Expiration
2041-12-30

AI Technical Summary

Technical Problem

The amplitude switching time of the automatic level control method used by existing millimeter wave frequency sources is on the order of milliseconds, which cannot meet the fast switching requirements of agile signals on the order of 100ns.

Method used

A device for controlling frequency sources is designed, including electrically adjustable attenuators, couplers, detectors, SPDT switches, operational amplifiers, analog-to-digital converters, digital-to-analog converters and controllers, through digital fast closed-loop loops and high-speed controllers Calculate the attenuation multiple to achieve fast amplitude control.

Benefits of technology

The amplitude switching time of the frequency source is realized to be less than 100ns, which meets the fast switching requirements of agile signals. When there is no need to output agile signals, it switches to an analog loop to ensure higher amplitude control accuracy.

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Abstract

The embodiment of the invention relates to a device and method for controlling a frequency source and the frequency source. The device comprises an electrically controlled attenuator, a coupler, a detector, a first SPDT switch, a second SPDT switch, a third SPDT switch, a comparator, a first operational amplifier, a second operational amplifier, an analog-to-digital converter, a digital-to-analog converter, a controller and a temperature sensor. The controller is used for acquiring the detection voltage of the detection signal through the analog-to-digital converter, acquiring first compensation data according to the detection voltage, the temperature data, the frequency control word and the amplitude control word, and controlling the digital-to-analog converter to generate a first compensation voltage signal; the first compensation voltage signal forms a first feedback signal, and the first feedback signal is used for adjusting the attenuation multiple of the electrically controlled attenuator. The amplitude control circuit of the frequency source provided by the embodiment of the invention can be switched to control the attenuation multiple directly through the theoretical value calculated by the high-speed controller when the agile signal needs to be output, so that the time of integral feedback by using an analog circuit is reduced.
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