A Radio Frequency Automatic Switching Circuit Based on Power Detection

Abstract

The invention discloses a radio frequency automatic switching circuit based on power detection, relates to the technical field of radio frequency communication, and is used to solve the problem that the radio frequency switching circuit in the prior art cannot automatically switch radio frequency signals, requires additional software control and has a complex circuit and slow response speed , the present invention includes a coupling circuit, a radio frequency switch, a power detection and logic output unit and a detection level adjustment unit, the radio frequency signal generates a coupling signal in the branch through the coupling circuit, and the power detection and logic output chip performs power detection and comparison to output logic control simulation Level, logic control analog level controls the switch of the radio frequency switch, and the detection level adjustment unit can control the power threshold of the signal. The invention has the advantages of fast response speed of switch automatic switching, adjustable switch switching power threshold, and low hardware circuit complexity , the advantages of simple circuit.

Description

technical field [0001] The invention relates to the technical field of radio frequency communication, in particular to a radio frequency automatic switching circuit based on power detection. Background technique [0002] Phase-locked frequency synthesis technology is a closed-loop automatic control technology that can track the phase of the input signal. It was widely used in the 1940s. Since then, phase-locked technology has developed rapidly, and promoted the development of frequency synthesis technology. Phase-locked frequency synthesizers, frequency-division phase-locked frequency synthesizers, and fractional phase-locked frequency synthesizers have appeared one after another. With the development of digital technology, the development of large-scale and ultra-large-scale integrated circuit technology, the number of frequency synthesizer chips has been realized, making the phase-locked frequency synthesizer widely used in the radio field. [0003] DDS is mainly composed...

AI Technical Summary

Problems solved by technology

[0011] The object of the present invention is: in order to solve the problem that the radio frequency switching circuit in the prior art cannot automatically switch the radio frequency signal, additional software control is required and the circuit is complicated and the response speed is slow, the present invention provides a radio frequency automatic switching circuit based on power detection, Directly use the power detection and logic output chip to directly detect the power output control level, without using FPGA or single-chip microcomputer, which greatly improves the corresponding speed of switching, and at the same time reduces the complexity of the hardware circuit and makes the circuit more stable

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