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Novel lock phase detection circuit

A detection circuit and phase-locking technology, applied in the direction of electrical components, automatic power control, etc., can solve the problems of high speed requirements and slow speed of microprocessors, and achieve the effect of easy multiplication, high speed and high precision.

Inactive Publication Date: 2005-03-16
TIANJIN UNIV
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Problems solved by technology

Traditional phase-lock detectors include analog phase-lock detectors and digital phase-lock detectors. Among them, the analog phase-lock detector needs to build an integration circuit with high performance requirements and an independent co

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Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0013] exist figure 1 Among them, 1 is an analog multiplier, and 2 is a microprocessor integrated with a Σ-Δ analog-to-digital converter.

[0014] The novel phase-lock detection circuit of the present invention is composed of an analog multiplier, a Σ-Δ analog-to-digital converter and a microprocessor. The analog multiplier is used to receive the measured signal and the reference signal, and realize the multiplication of the measured signal and the reference signal. The sigma-delta analog-to-digital converter is used to receive the signal output by the analog multiplier and convert it into a digital signal. The microprocessor is used to receive and output the digital signal output by the Σ-Δ ADC, control the sampling speed of the Σ-Δ ADC, filter parameters (cutoff frequency and order, etc.) and process the signal, etc. When necessary, the microprocessor can direct...

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Abstract

The invention discloses a novel phase-locked detection circuit, composed an analog multiplier, a Sigma-Delta converter and a microprocessor, where the analog multiplier receives the detected signal and a reference signal and multiplies them, the Sigma-Delta converter receives an output signal from the analog multiplier and converts it to a digital signal, and the microprocessor receives and outputs the digital signal. It has both the advantages of an analog phase-locked detector in simple circuit and multiplication implementation easiness and those of a digital phase-locked detector in high precision, good stability and parameter regulation convenience. The faint signal detection relates to a wide filed, especially a bioelectric signal detecting field. And because of its simple structure and excellent performance, it will be widely applied and bring along good benefits.

Description

technical field [0001] The invention belongs to a detection circuit, especially a phase-lock detection circuit, which is used for detecting weak electric information. Background technique [0002] Phase-lock detection is an important means of weak signal detection. Traditional phase-lock detectors include analog phase-lock detectors and digital phase-lock detectors. Among them, the analog phase-lock detector needs to build an integration circuit with high performance requirements and an independent conversion circuit; in the existing digital phase-lock detector In the detector, the measured signal and the reference signal are digitized and then multiplied, which is not only very slow, but also requires a high speed of the microprocessor. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the above-mentioned prior art, to provide a ...

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Application Information

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IPC IPC(8): H03L7/06H03L7/08
Inventor 林凌李刚王小林
Owner TIANJIN UNIV
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