Device for calibrating a clock signal

Details Device for calibrating a clock signal Device for calibrating a clock signal

2006-07-18

2006-07-18

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

C327S293000

Reexamination Certificate

active

07078952

ABSTRACT:
An integrated circuit having a clock calibration device receiving a local clock signal from an oscillator and applying a correction value to the signal to produce a corrected clock signal. The clock calibration device includes a frequency dividing module having a programmable divider and a calibration register for storing the correction value, the programmable divider receiving the local clock signal and delivering the corrected clock signal, and a circuit for determining a new correction value using an external reference signal. A time base unit produces a time base signal using a timing signal derived from the local clock signal, and it includes a counting module coupled to a load register wherein a load value is stored that determines the ratio between the frequency of the time base signal and that of the timing signal. An external computing unit loads a new load value into the load register by using the new correction value stored in the calibration register to deduce the new load value therefrom.

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patent: 1 134 921 (2001-09-01), None

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