Method and detection circuit for detecting direct current signal
A technology for detecting circuits and electrical signals, applied in the field of electronics, can solve the problems of poor filtering ability, lack of threshold judgment ability, limited voltage adjustment effect, etc., to achieve the effect of accurate detection
Inactive Publication Date: 2019-02-22
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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Problems solved by technology
[0004] However, in the current field of voltage detection, the proportional operation circuit composed of integrated operational amplifiers is a single-stage proportional operation circuit. The voltage detection circuit composed of such a single-stage proportional operation circuit has limited voltage adjustment effect, poor filtering ability, and does not Capable of threshold judgment
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[0024] Embodiments of the present invention will be described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of them. Those skilled in the art know that with the development of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present invention are also applicable to similar technical problems.
[0025] The embodiment of the present application provides a DC signal detection method and a detection circuit, which can enable DC voltage / current signals with different signal amplitudes to be accurately adjusted through a multi-stage proportional operation circuit, and meet the requirements of accurate detection by detection equipment. At the same time, it can also provide a threshold judgment mechanism and a filter circuit, so as to realize the protection and control of the overvoltage and overcurrent in t...
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The application discloses a method for detecting a direct current signal. The method is applied to a detection circuit. The detection circuit comprises a signal input module, a signal conversion module, an N-stage proportional operation circuit module, and a signal output module. The method is characterized in that the signal input module is used for receiving an original electrical signal; the signal conversion module is configured to convert the original electrical signal into an initial voltage signal; the N-stage proportional operation circuit module is configured to adjust the initial voltage signal to a target voltage signal, wherein the target voltage signal satisfies the detection condition of the target detection device and the N is a natural number greater than 1. The signal output module is used for outputting the target voltage signal to the target detection device for detection. In addition, the embodiment of the invention also provides a corresponding detection circuit for detecting a direct current signal. Therefore, direct-current voltage or direct-current signals with different signals amplitudes can be adjusted accurately based on the multi-stage proportional operation circuit, so that the precise detection condition of the detection device is satisfied.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a method and a detection circuit for direct current signal detection. Background technique [0002] In the field of DC power consumption, voltage and current detection is an essential function, and it is the information source for judging the working status of the system, so as to control the system as a whole and realize the normal operation of the system. [0003] At present, for the detection method of DC voltage / current signal, there are dedicated voltage / current detection chips in the industry, whose performance is stable and reliable, and the output accuracy of different types of chips is flexible and adjustable. However, compared with alternative circuits with the same signal detection accuracy, such as integrated operational amplifiers, their cost is relatively high and their market competitiveness is poor. Integrated operational amplifiers are integrated circuits wi...
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IPC IPC(8): G01R19/00
Inventor 张福至
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD