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Analog switch control circuit and mobile phone

A technology of analog switches and control circuits, which is applied to the structure of telephone sets, electrical components, and electrical digital data processing, etc., and can solve problems such as error-prone software control

Active Publication Date: 2013-01-02
成武县亿昌信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when an electronic device such as a mobile phone is turned off and connected to the host, software control is prone to errors

Method used

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  • Analog switch control circuit and mobile phone
  • Analog switch control circuit and mobile phone
  • Analog switch control circuit and mobile phone

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Embodiment Construction

[0024] An analog switch control circuit and a mobile phone provided by the present invention, in order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] Taking a certain MTK platform mobile phone with USB function as an example, the simplified diagram of the Micro USB interface and its analog switch circuit is as follows figure 1 shown. The analog switch in the figure is a single-pole double-throw analog switch 110, the power supply terminal VCC of the single-pole double-throw analog switch 110 is connected to the working power supply VBAT, and the GND terminal is connected to the reference ground. Micro USB (micro USB) interface 100 has gradually...

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Abstract

The invention relates to the field of a mobile terminal, and discloses an analog switch control circuit and a mobile phone. In the analog switch control circuit and the mobile phone which are provided by the invention, a second pin and a third pin of a micro universal serial bus (USB) interface are adopted to be connected with an output end of an analog switch, and a first pin of the micro USB interface is connected with a control end of the analog switch by a voltage division circuit, so that the power supply voltage of a USB line is reasonably utilized; compared with the conventional methodof controlling general purpose input / output (GPIO) software, the method for controlling the analog switch by hardware is rapider, simple and effective, and the resource of a GPIO interface is not occupied.

Description

technical field [0001] The invention relates to the field of mobile terminals, in particular to an analog switch control circuit and a mobile phone. Background technique [0002] With the development of electronic technology and the continuous improvement of people's living standards, the use of various electronic devices is becoming more and more popular. [0003] The analog switch is widely used in various electronic products. Multiple sets of mutually independent signal channels are used in one interface, and each set of signals can be flexibly converted according to the needs of users without mutual influence by switching the switch. [0004] In the prior art, a general purpose input and output (GPIO) is generally controlled by software to switch channels of an analog switch. This control method is relatively simple and flexible, but it will cause some problems in some special occasions. For example, when an electronic device such as a mobile phone is turned off and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/00G06F13/14H04B1/40H04M1/02
Inventor 刘科李坚
Owner 成武县亿昌信息科技有限公司