Emitter coupling sine integral phase discriminator and detection method thereof

Abstract

The invention relates to an emitter coupling sine integral phase discriminator which comprises an emitter coupling level control circuit, an interlock switch control circuit, an integration circuit, an integration time control signal source and a coil coupling circuit, wherein the signal input end of the emitter coupling level control circuit is connected with the signal output end of the integration time control signal source, and the signal output end of the emitter coupling level control circuit is connected with the control input end of the interlock switch control circuit; the signal input end of the interlock switch control circuit is connected with the output end of the coil coupling circuit; the signal output end of the interlock switch control circuit is connected with the signal input end of the integration circuit through a first switch; the signal output end of the integration circuit is a phase discrimination result output end; the coil coupling circuit internally comprises a coupling transformer; and the primary pole of the coupling transformer is connected with a detected signal. The invention further relates to a phase detection method of the emitter coupling sine integral phase discriminator. The anti-interference switching value transmission circuit disclosed by the invention has the advantages of strong interference rejection, high precision and higher high-frequency signal precision.

Description

technical field [0001] The invention belongs to the technical field of analog circuits, in particular to an emitter-coupled sinusoidal integral phase detector and a detection method. Background technique [0002] Phase information is one of the important parameters of sinusoidal signals. Some measurement techniques often involve the acquisition of weak signals. During the acquisition process of actual sensors or instruments, their inherent sinusoidal oscillation signals are easily submerged in noise. How to extract the phase of the useful sinusoidal signal is an important technical problem, and the phase detector is the key to solve this problem. At the same time, phase detectors are widely used in stable frequency generation systems, such as phase-locked loops. The phase-locked loop consists of three parts: a phase detector, a low-pass filter, and a voltage-controlled oscillator. The phase detector plays a role in ensuring the stable operation of the phase-locked loop. T...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: In order to overcome the shortcomings of existing phase detectors such as poor anti-interference ability and low precision, the present invention provides a phase detector and detection method based on emitter coupling sine integral

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