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Interface control circuit

A technology of interface control and interface, applied in the direction of circuits, circuit devices, emergency protection circuit devices, etc., can solve serious problems

Inactive Publication Date: 2019-10-18
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, the use of high-power transmission in handheld electronic devices is becoming more and more popular. If an electrochemical reaction occurs, the damage caused by it is more serious than the previous low-power transmission interface.

Method used

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Examples

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Embodiment Construction

[0030] see figure 1 , which shows an interface control circuit 10 according to a viewpoint of the present invention, which includes: an interface signal transceiver circuit 11 for transmitting and / or receiving an interface signal Sint through a transmission interface 13, wherein the transmission interface 13 includes a first An interface pin 131; and a protection circuit 12 with a switch 121 and a comparison circuit 122, the comparison circuit 122 is used to sense the voltage of the first interface pin 131, wherein the comparison circuit 122 has a threshold voltage range, the threshold voltage The range corresponds to an attachment event, and the switch 121 is used to control whether the first interface pin 131 is connected to a signal source Ss. When the first interface pin 131 is connected to the signal source Ss and the voltage of the first interface pin 131 is within the threshold voltage range, the interface signal transceiving circuit 11 is controlled to perform a protec...

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PUM

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Abstract

An interface control circuit comprises an interface signal transceiving circuit used for transmitting and / or receiving an interface signal through a transmission interface, and the transmission interface comprises a first interface pin; and a protection circuit which is provided with a switch and a comparison circuit, wherein the comparison circuit is used for sensing the voltage of the first interface pin, the comparison circuit is provided with a threshold voltage range, the threshold voltage range corresponds to a foreign matter contact event, and the switch is used for controlling whetherthe first interface pin is conducted with a signal source or not; wherein, when the first interface pin is conducted with the signal source and the voltage of the first interface pin is within a threshold voltage range, the interface signal transceiving circuit is controlled to perform a protection operation.

Description

technical field [0001] The invention relates to an interface control circuit, in particular to an interface control circuit for judging whether a transmission interface is contacted by a foreign object, so as to decide to perform a protection operation. Background technique [0002] Handheld electronic devices, because they are easy to carry and can be used at any time, will be placed in different positions according to the user's usage or habits, for example, placed on the dining table, or accidentally dropped during outdoor carrying. Landing on the ground etc. Some of them are placed in positions that often cause the transmission adapter in the handheld electronic device to be stuck or infiltrated by foreign objects, such as rainwater, beverages, or hair. If the transmission interface containing foreign matter is forced to be connected with another transmission adapter, the electrical or electrochemical characteristics of the foreign matter will often cause signal transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0175
CPCH03K19/017509H02H3/207H01R24/60H02H7/20
Inventor 穆志伟罗玠旻张维中
Owner RICHTEK TECH