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Power circuit and oscilloscope probe

A technology of power supply circuit and positive power supply, applied in the field of electronics, can solve the problem of powering on the positive and negative poles at the same time

Pending Publication Date: 2021-03-16
SHENZHEN ZHIYONG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a power supply circuit and an oscilloscope probe to solve the problem of inrush current generated when the existing equipment is plugged into the power supply and the positive and negative poles are powered on at the same time

Method used

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  • Power circuit and oscilloscope probe
  • Power circuit and oscilloscope probe
  • Power circuit and oscilloscope probe

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Embodiment Construction

[0051] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0052] The present invention provides a power supply circuit provided by the present invention, including a positive input node and a negative input node, a first start-up module and a second start-up module, a first filter capacitor and a second filter capacitor, a positive output node and a negative output node; The first start-up module is used to receive a positive power supply signal from the positive input node and a negative power supply signal from the negative input node, output a slowly increasing positive voltage according to the positive power supply signal and the negative power supply ...

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Abstract

The invention provides a power supply circuit. The power supply circuit comprises a positive input node, a negative input node, a first starting module, a second starting module, a first filter capacitor, a second filter capacitor, a positive output node and a negative output node, wherein the first starting module is used for receiving a positive power supply signal from the positive input node and a negative power supply signal from the negative input node, and outputting a slowly increased positive voltage according to the positive power supply signal and the negative power supply signal. The second starting module is used for receiving a positive power supply signal from a positive input node and a negative power supply signal from a negative input node, and outputting a negative voltage of which the absolute value is slowly increased according to the positive power supply signal and the negative power supply signal, and the positive voltage is further provided for the positive output node after passing through the first filter capacitor; and the negative voltage is further provided for the negative electrode output node after passing through the second filter capacitor, so that the soft start of the electric equipment is realized, and no impact current is generated when the electric equipment is inserted into a power supply.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a power supply circuit and an oscilloscope probe. Background technique [0002] Existing oscilloscope probes include active probes and passive probes. Among them, the active probe mainly takes power from the oscilloscope. The oscilloscope can provide a set of positive and negative power supplies for active probes, such as ±12V or ±15V. However, there is a group of large filter capacitors on the power supply circuit of the existing active probe. When the oscilloscope is not inserted, the voltage value of the filter capacitors is 0, and the moment the oscilloscope is inserted, the voltage value of the filter capacitors immediately Change to ±12V or ±15V, a huge voltage change will generate a large impact current on the filter capacitor, which may easily cause the internal circuit of the oscilloscope to fail to work normally. Active probes include a positive pin for positive ...

Claims

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Application Information

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IPC IPC(8): H02M1/36G01R1/067
CPCG01R1/067H02M1/36
Inventor 樊小明
Owner SHENZHEN ZHIYONG ELECTRONICS CO LTD
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