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Load protection circuit

A load protection circuit and circuit technology, applied in emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve problems affecting detection efficiency, switch damage, detection work interruption, etc. question

Active Publication Date: 2016-03-02
NINGBO ZHONGRONG ACOUSTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the frequent use of these switches, if the switch is directly connected to the power amplifier and operated, it is easy to cause damage to the switch, which will cause the interruption of the detection work and affect the detection efficiency.

Method used

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, a load protection circuit of the present invention includes at least two channel circuits, a channel switching circuit for switching at least two channel circuits, and a power supply circuit; the channel switching circuit is connected to at least two channel circuits; the Both the at least two channel circuits and the channel switching circuit are connected to the power circuit. Power circuit such as Figure 5 shown. In this embodiment, there may be multiple channel circuits, and the structures of the channel circuits are all the same, that is, one of the channel circuits includes plug-in modules JK1 and JK2 for plug insertion, and an output module JK3 for signal output. Switch S3, SPDT switch SW2, diodes D4 and D5, relays JDQ1 and JDQ2, resistors R3 and R4;...

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PUM

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Abstract

The invention discloses a load protection circuit. The load protection circuit comprises at least two channel circuits, a channel switching circuit for switching the at least two channel circuits and a power supply circuit; the channel switching circuit is connected with the at least two channel circuits; and the at least two channel circuits and the channel switching circuit are all connected with the power supply circuit. The load protection circuit can prevent test equipment from being damaged.

Description

technical field [0001] The invention relates to the technical field of protection circuits, in particular to a load protection circuit for preventing power amplifiers from being burned out during detection. Background technique [0002] At present, when testing a power amplifier, the power supply of the power amplifier is directly connected to the mains, and then the power amplifier is connected to an oscilloscope and an audio analyzer. Connect the input end of the power amplifier to the load, connect the output end of the power amplifier to an oscilloscope and an audio analyzer, and use some switches to detect whether the relevant parameters of the power amplifier are normal or not. Since these switches are used very frequently, if the switches are directly connected to the power amplifier for operation, the switches are easily damaged, thereby causing interruption of detection work and affecting detection efficiency. Therefore, based on the above reasons, there is an urge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02
Inventor 闫峻刘坤曹宇
Owner NINGBO ZHONGRONG ACOUSTICS TECH