A single chip dual-card dual-standby mobile telephone

A dual-card dual-standby, single-chip technology, applied in the field of mobile communications, can solve the problems of large size and high cost of dual-card dual-standby mobile phones, and achieve the effects of small size, low cost, and easy portability

Active Publication Date: 2008-07-09
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of such a dual-card dual-standby mobile phone remains high, and the volume is relatively large

Method used

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  • A single chip dual-card dual-standby mobile telephone
  • A single chip dual-card dual-standby mobile telephone
  • A single chip dual-card dual-standby mobile telephone

Examples

Experimental program
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Embodiment Construction

[0015] The single-chip dual-card dual-standby mobile phone of the present invention is referring to the hardware block diagram of Fig. 2, including antenna, radio frequency module, baseband processing chip, two SIM card slots and other peripherals, the SIM interface of the baseband processing chip is connected to the SIM card slot through an electronic switch circuit, And the selection of the SIM card is realized by connecting the electronic switch circuit through the chip selection control interface.

[0016] The electronic switch controls the switching of the SIM card. During the switching period, the electronic switch only disconnects the I / O and CLK pins of one SIM card, and simultaneously connects the I / O and CLK pins of the other SIM card. Pins, while the VSIM, RST, GND, and VPP of the SIM card are not disconnected during the switching of the SIM card. Therefore, during the switching of the SIM card, only the disconnected SIM card cannot perform read and write operations....

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PUM

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Abstract

The invention discloses a dual card dual standby mobile phone which is realized by a single chip. The single chip dual card dual standby mobile phone comprises an antenna, a radio frequency module, a baseband processing module, a power supply module and two SIM slots. The baseband processing module is connected with an electronic switch which is connected with two SIM slots at the same time through an SIM interface and controls the electronic switch through a chip-selection control circuit. Therefore, the invention realizes the standby of two cards on a set of mobile phone hardware at the same time, reduces the volume of the dual card mobile phone, reduces the cost and has convenient application.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a dual-card dual-standby mobile phone realized by a single chip. Background technique [0002] Driven by technology, market and wireless mobile application business, the wireless mobile communication industry has developed rapidly, and mobile communication products have become a necessity for people's daily work and life. As mobile communication has more and more influence on people's life, there are more and more phenomena that a person needs two mobile phones. For example, some people who need to work frequently in two places usually have a local SIM card in each of the two places in order to avoid expensive roaming charges, and use different SIM cards in different cities. However, it is very troublesome to change the SIM card frequently or carry two mobile phones, so a dual-card dual-standby mobile phone with two numbers in one phone came into being. [0003] The inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/32
Inventor 崔世军
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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