Method and device for adjusting chip crystal oscillator frequency

A crystal oscillator frequency and chip technology, applied in the field of crystal oscillator frequency adjustment inside the chip, can solve problems such as increased chip manufacturing costs, achieve the effect of automatically adjusting the crystal oscillator frequency and avoiding abnormal crystal oscillator frequency points

Pending Publication Date: 2022-06-21
ANALOGIX CHINA SEMICON +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method and device for adjusting the frequency of the crystal oscillator of the chip to solve the problem of increasing the cost of chip manufacturing caused by the technical means used to prevent the drift of the internal frequency of the chip in the related art

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  • Method and device for adjusting chip crystal oscillator frequency
  • Method and device for adjusting chip crystal oscillator frequency
  • Method and device for adjusting chip crystal oscillator frequency

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Embodiment Construction

[0020] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0021] In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted th...

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Abstract

The invention discloses a method and device for adjusting the frequency of a chip crystal oscillator. The method comprises the following steps: determining an abnormal crystal oscillator frequency point of a target chip, and determining an abnormal crystal oscillator frequency corresponding to the abnormal crystal oscillator frequency point; determining a lowest temperature crystal oscillator frequency corresponding to the target chip, a highest temperature crystal oscillator frequency corresponding to the target chip and a crystal oscillator frequency drift value corresponding to the target chip; determining whether the target chip is in a to-be-adjusted state or not according to the abnormal crystal oscillator frequency, the lowest temperature crystal oscillator frequency and the crystal oscillator frequency drift value; when the target chip is in the to-be-adjusted state, determining the adjustment step length of the crystal oscillator; and adjusting the crystal oscillator frequency of the abnormal crystal oscillator frequency point according to the adjustment step length. According to the invention, the problem that the manufacturing cost of the chip is increased due to the technical means adopted for preventing the drift of the internal frequency of the chip in the prior art is solved.

Description

technical field [0001] The invention relates to the field of crystal oscillator frequency adjustment inside a chip, in particular to a method and a device for adjusting the chip crystal oscillator frequency. Background technique [0002] In the related art, many chips integrate crystal oscillators, but the frequency of the crystal oscillator will increase when the temperature becomes lower, and the frequency will decrease when the temperature becomes higher. Therefore, the frequency sensitive circuit may work abnormally. In order to prevent the drift of the crystal oscillator frequency, the usual practice is to add a frequency calibration circuit inside the chip to ensure the accuracy of the frequency when the temperature changes. However, this calibration circuit will increase the complexity of the chip design and the die area of ​​the chip, which will cause the chip design. and increase in manufacturing costs. [0003] For the above problems existing in the related art, n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L1/02
CPCH03L1/022
Inventor 李金秀肖勇
Owner ANALOGIX CHINA SEMICON
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