Phase comparison circuit and radio frequency chip

CN122348739APending Publication Date: 2026-07-07LANSUS TECH INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LANSUS TECH INC
Filing Date
2026-06-08
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing phase comparison circuits suffer from problems such as signal nonlinearity distortion, weak anti-interference capability, poor temperature drift characteristics, limited phase detection range, large number of components, low integration, high static power consumption, and strong electromagnetic radiation in high-frequency radio frequency signal processing.

Method used

A phase comparison circuit consisting of a first amplifier, a second amplifier, a frequency divider, a Schmitt trigger, a flip-flop, an AND gate unit, and a filter unit is used. The phase is compared after the frequency is reduced by the frequency divider. The phase detection in the range of 0-360° is achieved by combining the flip-flop and the AND gate unit, and noise is filtered out by the Schmitt trigger.

Benefits of technology

It achieves accuracy and stability in wide-range phase detection, reduces circuit complexity and power consumption, reduces the number of components, lowers production costs, and extends product life.

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Abstract

The application is suitable for the field of radio frequency technology, and particularly relates to a phase comparison circuit and a radio frequency chip. The phase comparison circuit comprises a first amplifier, a second amplifier, a first frequency divider, a second frequency divider, a first Schmitt trigger, a second Schmitt trigger, a first flip-flop, a second flip-flop, an AND gate unit, a first filter unit and a second filter unit; an input end of the first amplifier is used for receiving a first radio frequency signal, an output end of the first amplifier is connected with an input end of the first frequency divider, an input end of the second amplifier is used for receiving a second radio frequency signal, and an output end of the second amplifier is connected with an input end of the second frequency divider; the first frequency divider and the second frequency divider are respectively used for reducing the frequency of the amplified first radio frequency signal and the amplified second radio frequency signal; compared with the prior art, the phase comparison circuit provided by the application has the advantages of simple structure, wide phase detection range, stable output and the ability to effectively reduce the complexity of radio frequency front-end power control.
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