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Method for generating a time base in a mobile telephone

A mobile phone, basic technology, applied in the field of time base generation, can solve problems not related to mobile phones, etc.

Inactive Publication Date: 2009-04-29
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this document does not address the issue of mobile phones generating an available time base in standby mode to reduce power consumption

Method used

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  • Method for generating a time base in a mobile telephone
  • Method for generating a time base in a mobile telephone
  • Method for generating a time base in a mobile telephone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Fig. 3 shows the first working mode 301, the second working mode 302 and the third working mode 303 of the time base generation system, all of which work alternately according to the activation status of the mobile phone according to the method of the present invention.

[0039] The time base generation system mainly includes:

[0040] The quartz oscillator 304 can generate a very stable high-frequency and high-spectrum-purity basic signal, such as a basic signal with a frequency of 13MHz;

[0041] a power amplifier 305, through which the base signal Sb is transmitted and at the same time provides an amplified base signal Sba which is also very stable and of high spectral purity;

[0042] The frequency divider 306 receives at its input the unamplified basic signal Sb split from the splitter 307 at the same level; the frequency divider 306 can obtain the second signal S2, whose frequency is lower than the basic signal, such as 32KHz ( 32.768KHz in practice). In order t...

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Abstract

The invention relates to a method of generating a time base in a mobile telephone, which only involves the use of a high-frequency oscillator (304), the commonly-used low-frequency oscillator being eliminated. In this way, the invention reverts to the initial architecture for mobile telephones, in which only a high-frequency oscillator was used to generate a time base. According to the invention, in order to limit the power consumption of a mobile telephone that is not in a communication mode, different operating modes (301; 302; 303) are provided, each operating mode being associated with a specific power supply mode for the time-base-generating system. In this way, the mobile telephone passes from one power supply mode to another depending on the operating conditions thereof.

Description

technical field [0001] The invention relates to a time base generation method in a mobile phone. More precisely, the invention proposes a solution for the continuous generation of a time base by a mobile phone, which reduces energy consumption compared to similar methods of the prior art. Background technique [0002] In general, the present invention relates to the field of mobile telephony. In this field, being able to provide a very accurate time base to the telephone microprocessor, so that the phone can be fully synchronized on the wireless telephone network it belongs to is of primary importance. The time base is usually provided by an oscillator, such as a quartz oscillator. Taking the case of GSM as an example, initially only one oscillator provides a clock signal of 13MHz (megahertz) for the working rhythm of the phone. The oscillator maintains a high spectral purity at all times in this case, so that its energy consumption cannot be ignored. [0003] Plagued by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/02H04W88/02
CPCH04W52/028Y02D30/70
Inventor 费尔南多·罗马奥
Owner APPLE INC