Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Determining machine or apparatus operating time or...
Reexamination Certificate
2005-08-02
2005-08-02
Wambach, Margaret R. (Department: 2816)
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Determining machine or apparatus operating time or...
C377S044000, C327S146000, C327S151000, C327S293000
Reexamination Certificate
active
06925139
ABSTRACT:
The present invention relates to an integrated circuit comprising a first clock circuit delivering a first clock signal, a second clock circuit delivering a second clock signal, a first counting circuit for delivering a time base signal using a clock signal and a counting value, and means for applying the first clock signal and a first counting value to the first counting circuit, so as to produce a first time base signal. According to the present invention, the integrated circuit comprises means for producing a second time base signal using the second clock signal and a second counting value, and means for calibrating the second counting value such that it is equal or proportional to the number of periods of the second clock signal occurring during a determined time interval equal to a period or to a whole number of periods of the first time base signal. Application particularly to the management of a timer in a microprocessor.
REFERENCES:
patent: 5483185 (1996-01-01), Scriber et al.
patent: 5631853 (1997-05-01), Miller et al.
patent: 0 246 120 (1987-11-01), None
patent: 0 316 943 (1989-05-01), None
Lendre Sandrine
Plourde Olivier
Roche Franck
Carlson David V.
Jorgenson Lisa K.
Seed IP Law Group PLLC
STMicroelectronics S.A.
Wambach Margaret R.
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