System and device for calibrating oscillator charateristic curve
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United States of America Patent
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Issued Date -
Jan 6, 2005
app pub date -
Mar 8, 2004
filing date -
Jul 1, 2003
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a system and an device for calibrating oscillator characteristic curve, more particularly, to a system and device that are capable of making an evaluation to determine whether it is necessary to change the characteristic curve of the oscillator by means of a calibration device; if so, the device will send a calibration signal to a calibration circuit for changing the circuit characteristic thereof so as to choose an appropriate characteristic curve of the oscillator. The present invention can calibrate the frequency characteristic curve of the oscillator automatically so as to avoid being affected by the manufacture process and temperature. Furthermore, the manual adjustment is no longer required before every shipping that not only can reduce the uncertainty caused by manual adjustment, but also can reduce labor cost. Besides, the present invention can calibrate the frequency characteristic curve of the oscillator at any time so that the quality of the product according to the present invention can be assured even after shipping. The foregoing advantages are not achievable using the prior art.
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