Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2010-01-26
2011-11-15
Kinkead, Arnold (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S034000, C331S17700V, C327S031000, C327S037000, C327S172000, C327S175000, C327S176000, C327S178000
Reexamination Certificate
active
08058932
ABSTRACT:
A digital pulse width modulation device includes a counter, a first comparator and a second comparator, wherein the first and second comparators are connected in parallel with each other and in series with the counter. The counter is capable of sending a count signal to the first and second comparators simultaneously, starting a count when the counter receives a clock signal, and transmitting the count signal to the first and second comparators. If the first comparator receives a pulse duty width signal, the count of the count signal will generate a pulse output of the corresponding duty cycle. If the second comparator receives a total pulse duty length signal and the count of the count signal reaches a number of the total length, a clear signal will be outputted to the counter to reset the counter to zero, so as to achieve the effect of correcting the output pulse.
REFERENCES:
patent: 7362152 (2008-04-01), Figoli
Liu Ta-I
Tung Chung-Chih
Kinkead Arnold
Liu Ta-I
Shih Chun-Ming
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