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USB interface circuit and electronic device using same

A USB interface and circuit technology, which is applied in the field of electronic devices and USB interface circuits, can solve problems such as unrecognizable USB devices

Pending Publication Date: 2020-10-16
HONG FU JIN PRECISION IND WUHAN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are design flaws in the existing USB3.0 circuit, when the compatibility test is carried out for the USB3.0 interface, it will not be able to recognize some of the plugged USB devices

Method used

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  • USB interface circuit and electronic device using same
  • USB interface circuit and electronic device using same
  • USB interface circuit and electronic device using same

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them.

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the USB interface circuit in the present invention and the electronic device using the USB interface circuit will be further described in detail and related illustrate.

[0037] Please refer to figure 1 , A preferred embodiment of the present invention provides an electronic device 100 , the electronic device 100 includes a USB interface circuit 10 and a main control chip 20 . The USB interface circuit 10 is communicatively connected with the main control chip 20, the USB interface circuit 10 is used to realize the communication connection between the...

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PUM

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Abstract

The invention provides an electronic device. The electronic device comprises a USB interface circuit and a main control chip, and the USB interface circuit is connected with the main control chip andis used for realizing communication connection between the main control chip and a USB device. The USB interface circuit further comprises a USB interface, a switching driver and a filter circuit. TheUSB interface is used for being connected with the USB device in an inserted mode so as to establish electrical connection, wherein the switching driver is electrically connected between the USB interface and the main control chip, and the switching driver drives signals transmitted between the USB device and the main control chip according to a preset coefficient; the filter circuit is electrically connected between the USB interface and the switching driver, and the filter circuit is used for filtering common-mode interference between the USB interface and the switching driver. Therefore, the plugged USB device can be effectively identified.

Description

technical field [0001] The invention relates to a USB interface circuit and an electronic device using the USB interface circuit. Background technique [0002] With the rapid development of universal serial bus (Universal Serial Bus, USB) technology, according to different interface types, USB interfaces can be classified into Type-A, Type-B, Type-C and other types. According to different transmission rates, the USB interface can be divided into USB 1.0, USB 2.0, USB 3.0 and other types. There are design flaws in the existing USB3.0 circuit, and when the compatibility test is carried out for the USB3.0 interface, it will not be able to recognize some of the inserted USB devices. Contents of the invention [0003] In view of this, it is necessary to provide a USB interface circuit for effectively identifying USB devices and an electronic device using the USB interface circuit. [0004] A kind of USB interface circuit, is used for realizing the communication connection bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38G06F13/42
CPCG06F13/382G06F13/4282
Inventor 程万林
Owner HONG FU JIN PRECISION IND WUHAN CO LTD
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