Power supply detecting device and method
A technology for power supply detection and power supply to be tested, applied in the field of circuits, can solve the problems of complex detection methods, high system overhead, and high working environment requirements, and achieve the effects of multiple detection functions and strong anti-interference ability.
Inactive Publication Date: 2015-04-29
ZTE CORP
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Problems solved by technology
[0003] Due to the use of the op amp, the above detection method needs to provide a separate reference reference and power supply voltage, and the detection method is complex and the system overhead is large; in addition, the comparator has poor anti-interference ability and has high requirements for the working environment
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[0043] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0044] like figure 1 As shown, a power detection device includes: a rectifier circuit, a signal conversion circuit and a single-chip microcomputer;
[0045] The rectification circuit is used to convert the negative amplitude of the original signal output by the power supply under test into a positive amplitude to obtain a rectified signal;
[0046] The signal conversion circuit is used to convert the rectified signal into a square wave signal;
[0047] The single-chip microcomputer is used to determine the output state of the power supply under test according to the square wave signal.
[0048] like figure 2 As shown, when the AC output of the power supply under test is output, its original signal appears as a sinusoidal curve 21, and the rectifier c...
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The invention discloses a power supply detecting device and method, and relates to the field of circuits. The detecting device comprises a rectifying circuit, a signal converting circuit and a single-chip microcomputer, wherein the rectifying circuit is used for converting a negative vibration amplitude of an original signal output by a to-be-detected power supply into a positive vibration amplitude to obtain a rectifying signal; the signal converting circuit is used for converting the rectifying signal into a square wave signal; the single-chip microcomputer is used for determining the output condition of the to-be-detected power supply according to the square wave signal. According to the scheme, the single-chip microcomputer is adopted for AC / DC judgment on the to-be-detected power supply, so that the anti-interference ability is higher as compared with that in the prior art, while more detecting functions can be expanded by correspondingly adding codes of the single-chip microcomputer.
Description
technical field [0001] The invention relates to the field of circuits, and provides a power supply detection device and method. Background technique [0002] In the AC power supply compatible with high-voltage DC, it is necessary to judge the input state of the AC and DC, and determine the working state of the power supply according to the input state. In the prior art, a comparator is usually used, and the comparator judges whether it is an AC input or a DC input through changes in high and low levels. [0003] Due to the use of operational amplifiers, the above-mentioned detection method needs to provide a separate reference reference and power supply voltage, and the detection method is complicated and the system overhead is large; in addition, the comparator has poor anti-interference ability and has high requirements for the working environment. Therefore, under the requirement of high power density of today's power supply, a simple, comprehensive, stable and reliable ...
Claims
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Inventor 刘辉杰卢至锋
Owner ZTE CORP