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Voltage drop detecting circuit

A technology for detecting circuit and voltage drop, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve problems such as difficult measurement and complicated implementation steps

Inactive Publication Date: 2012-07-11
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex implementation steps of this method and the high difficulty of measurement, it is only suitable for laboratory measurement and cannot be extended to production sites

Method used

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and preferred embodiment the present invention is described in further detail:

[0028] Please refer to figure 1 A preferred embodiment of the voltage drop detection circuit of the present invention includes a reference voltage generation circuit 10 , a comparison circuit 12 , a latch circuit 15 , a reset circuit 16 and a display circuit 18 .

[0029] The first input end of the comparison circuit 12 is connected to the power supply circuit of the electronic product under test, and is used for receiving the voltage output by the power supply circuit of the electronic product under test when a specified load is applied. The second input terminal of the comparison circuit 12 is connected to the reference voltage generating circuit 10 for receiving a reference voltage. The comparison circuit 12 is used for comparing the voltage value output by the power supply circuit with a reference voltage value, and outputting a comparison...

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PUM

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Abstract

The invention discloses a voltage drop detecting circuit, which comprises a reference voltage generating circuit, a comparing circuit, a latch circuit, a display circuit and a reset circuit. The reference voltage generating circuit is used for generating a reference voltage value; the comparing circuit is used for comparing the reference voltage value with an output voltage value of a power supply circuit of an electronic product to be detected and outputting a comparing signal according to the comparison result. The latch circuit is used for outputting a control signal according to the comparison signal and latching the output signal. The display circuit is used for working according to the control signal. And the reset circuit is used for releasing the latch state of the latch circuit. According to the voltage drop detecting circuit, when the output of the power supply circuit fails to meet the requirement, the display circuit prompts a tester and latches the state through the comparing circuit and the latch circuit, thereby avoiding fussy operations when an oscilloscope is used for testing.

Description

technical field [0001] The invention relates to a voltage drop detection circuit. Background technique [0002] The voltage drop test is one of the functional tests of the power supply circuit of electronic products. Its purpose is to detect the response ability of the system under test when the specified load is added to the instantaneous power supply circuit. The current common solution is to use an oscilloscope to capture the instantaneous change of the power supply voltage waveform, and measure the voltage at the lowest point of the waveform to determine whether there is a voltage drop that does not meet the requirements. Due to the complex implementation steps of this method and the high difficulty of measurement, it is only suitable for laboratory measurement and cannot be extended to production sites. Contents of the invention [0003] In view of the above, it is necessary to provide a convenient voltage drop detection circuit. [0004] A voltage drop detection ci...

Claims

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Application Information

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IPC IPC(8): G01R19/165
Inventor 曹朝杰丛卫东
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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