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Power signal detection circuit and method

A power signal and detection circuit technology, applied in the direction of electric power measurement through current/voltage, electric power measurement through pulse modulation, etc., can solve the problems of complex circuit design, small linear range, poor temperature stability, etc., and achieve simplified circuit design , Improve the effect of linear range and stability

Pending Publication Date: 2021-11-02
ON BRIGHT ELECTRONICS SHANGHAI
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Problems solved by technology

Traditionally, the widely used variable transconductance analog multiplier is based on the differential transistor op amp design, which has the disadvantages of complex circuit design, small linear range, large noise, and poor temperature stability.

Method used

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  • Power signal detection circuit and method
  • Power signal detection circuit and method

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Embodiment Construction

[0025] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configurations and algorithms presented below, but covers any modification, substitution, and improvement of elements, components, and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention. ...

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Abstract

The invention provides a power signal detection circuit and method. The power signal detection circuit comprises a first conversion module configured to generate a pulse width modulation signal based on a first signal in an input voltage signal and an input current signal, the duty ratio of the pulse width modulation signal being linearly correlated with the size of the first signal; a second conversion module configured to generate a representation voltage signal based on a second signal in the input voltage signal and the input current signal, the size of the representation voltage signal being linearly related to the size of the second signal; and a low-pass filtering module configured to generate a voltage signal which is linearly related to an input power signal and is used for representing power based on the pulse width modulation signal and the representation voltage signal, the input power signal referring to a power signal generated by multiplying the input voltage signal and the input current signal.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a power signal detection circuit and method. Background technique [0002] The traditional power signal detection is to detect the voltage signal and the current signal separately, and then use the analog multiplier to multiply the voltage signal and the current signal to obtain the power signal. figure 1 A schematic diagram of the working principle of a traditional power signal detection circuit is shown. Traditionally, the widely used variable transconductance analog multiplier is based on the differential transistor op amp design, which has the disadvantages of complex circuit design, small linear range, large noise, and poor temperature stability. Contents of the invention [0003] In view of the defects of traditional analog multipliers, the present invention provides a power detection circuit and method. [0004] The power signal detection circuit according to the emb...

Claims

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Application Information

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IPC IPC(8): G01R21/127G01R21/06
CPCG01R21/127G01R21/06H02M3/33523H02M1/0087H02M1/0009H02M3/33515
Inventor 杨彭林方烈义
Owner ON BRIGHT ELECTRONICS SHANGHAI
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