Oscillators – Ring oscillators
Reexamination Certificate
2005-11-15
2005-11-15
Mis, David (Department: 2817)
Oscillators
Ring oscillators
C331S034000, C331S17700V, C327S256000, C327S257000
Reexamination Certificate
active
06965273
ABSTRACT:
A design for an inverting delay component of an oscillator is disclosed, which enables the oscillator to be more tolerant of parameter variations. This increased parameter variation tolerance allows the KVCOof the oscillator to vary less between the worst case scenario (where the components of the oscillator meet minimum specifications) and the best case scenario (where the components meet the maximum specifications). This in turn means that the worst case KVCOvalue will be significantly smaller than in the prior art. By using a significantly smaller KVCOvalue, the jitter experienced at the output of the oscillator will be substantially reduced. Thus, this design enables a low-jitter oscillator to be realized.
REFERENCES:
patent: 4939390 (1990-07-01), Coe
patent: 5418498 (1995-05-01), DeVito et al.
patent: 6043719 (2000-03-01), Lin et al.
D'Souza Lewelyn
Swei Yuwen
Hickman Palermo & Truong & Becker LLP
Mis David
Via Technologies Inc.
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