Complementary ring oscillator with capacitive coupling

Details Complementary ring oscillator with capacitive coupling Complementary ring oscillator with capacitive coupling

2009-01-14

2010-12-14

Pascal, Robert (Department: 2817)

Oscillators

Ring oscillators

C331S002000, C331S046000

Reexamination Certificate

active

07852161

ABSTRACT:
An oscillator. The oscillator includes a first ring oscillator having a first plurality of inverters, a first plurality of capacitors each having a first terminal coupled to an output terminal of a corresponding one of the first plurality of inverters, a second ring oscillator having a second plurality of inverters, and a second plurality of capacitors each having a first terminal coupled to an output terminal of a corresponding one of the second plurality of inverters. A second terminal of the first plurality of capacitors is coupled to an output terminal of a corresponding one of the second plurality of inverters. A second terminal of the second plurality of capacitors is coupled to an output terminal of a corresponding one of the first plurality of inverters. The oscillator is configured to provide as an output a differential clock signal.

REFERENCES:
patent: 5864258 (1999-01-01), Cusinato et al.
patent: 6333680 (2001-12-01), Smith et al.
patent: 6943633 (2005-09-01), Singh
patent: 7355488 (2008-04-01), Park
patent: 7482884 (2009-01-01), Wang et al.

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