Method and system for measuring accuracy of crystal oscillators

An accuracy and crystal oscillator technology, applied in the field of crystal oscillator measurement, can solve problems such as low work efficiency and inconvenient operation, and achieve the effect of improving work efficiency, saving troubleshooting time and labor costs

Active Publication Date: 2012-10-10
HUIZHOU TCL MOBILE COMM CO LTD
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Problems solved by technology

[0004] In view of the deficiencies of the prior art above, the purpose of the present invention is to provide a method and system for measuring the accuracy of the crystal ...

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  • Method and system for measuring accuracy of crystal oscillators
  • Method and system for measuring accuracy of crystal oscillators

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Embodiment Construction

[0033] The present invention provides a method and system for measuring the accuracy of crystal oscillators, by using a normal crystal oscillator and two timers to measure whether the crystal oscillator to be checked is normal, and using a software measurement method to obtain the clock frequencies of the two crystal oscillators respectively , Judging the accuracy of the crystal oscillator to be checked by comparing the two, not only greatly improves the efficiency of the investigation, but also saves huge labor costs.

[0034] In order to make the object, technical solution and effect of the present invention more clear and definite, 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.

[0035] see figure 1 , the method for measuring crystal oscillator accu...

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Abstract

The invention discloses a method and a system for measuring accuracy of crystal oscillators. The method includes enabling a first timer and a second timer to respectively start counting clock frequency of a first crystal oscillator and clock frequency of a second crystal oscillator; circularly reading a count value of the second timer until the count value of the second timer is equal to the clock frequency of the second crystal oscillator; and reading a count value of the first timer and acquiring actual clock frequency of the second crystal oscillator according to the count value of the first timer so as to judge the accuracy of the second crystal oscillator. Measurement by the aid of instruments or machine detachment are omitted in a troubleshooting process for problematic crystal oscillators, mobile phones with the problematic crystal oscillators are screened only by the aid of software measurement, work efficiency is greatly improved, troubleshooting time and labor cost are greatly saved, and the method and the system are applicable to large-scale production.

Description

technical field [0001] The invention relates to the technical field of crystal oscillator measurement, in particular to a method and system for measuring the accuracy of crystal oscillators. Background technique [0002] At present, external crystal oscillators are bound to be used in mobile phones. Generally, there are at least two crystal oscillators. One is a high-precision and high-frequency crystal oscillator A, which is used to provide the clock frequency required for CPU operation; the other is an ordinary crystal oscillator B, which is mainly used for It is provided for low-speed devices such as system real-time clock and Bluetooth. Usually, the crystal oscillator that is prone to supply quality problems on the production line is the ordinary crystal oscillator B. [0003] When the production line produces mobile phones, once the quality of a certain batch of crystal oscillators is found to be defective, it is necessary to dismantle all the produced mobile phones, a...

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Application Information

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IPC IPC(8): G01R23/02
Inventor 李炜锋杨岳王鹏蕾
Owner HUIZHOU TCL MOBILE COMM CO LTD
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