Oscillators – Ring oscillators
Reexamination Certificate
2007-12-25
2007-12-25
Kinkead, Arnold (Department: 2817)
Oscillators
Ring oscillators
C331S00100A, C331S034000, C331S074000, C327S156000, C327S175000, C327S176000
Reexamination Certificate
active
10559837
ABSTRACT:
A high resolution pulse width modulation (PWM) or voltage controlled output (DCO) generator is disclosed. The resolution is increased over that of the circuit clock by delaying the generated signal through a series of delays, all of which are controlled by a delay locked loop. The delays are a small fraction of the clock period, thus providing resolution greater than that of the circuit clock.
REFERENCES:
patent: 5712582 (1998-01-01), Yokota
patent: 5883534 (1999-03-01), Kondoh et al.
patent: 6147532 (2000-11-01), Ueda
patent: 100 06 927 (2000-12-01), None
Giannopoulos Demetri
Li Qiong M.
Im Paul
Kinkead Arnold
Koninklijke Philips Electronics , N.V.
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