Oscillator having comparator circuits having adjustable...

Details Oscillator having comparator circuits having adjustable... Oscillator having comparator circuits having adjustable...

2011-01-04

2011-01-04

Kinkead, Arnold (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S135000, C331S143000, C327S131000, C327S182000

Reexamination Certificate

active

07863992

ABSTRACT:
An oscillator includes a first comparator circuit, a second comparator circuit, an oscillation signal generator circuit, and a frequency voltage generator circuit. The first comparator circuit generates a first pulse when a frequency voltage reaches a first reference voltage, and the second comparator circuit generates a second pulse when the frequency voltage reaches a second reference voltage. The oscillation signal generator circuit generates an oscillation signal by latching a first voltage in response to the first pulse and latching a second voltage in response to the second pulse. The frequency voltage generator circuit raises or lowers the frequency voltage in response to the oscillation signal. The driving capability of the first comparator circuit is reduced at the latching of the first voltage and is restored at the latching of the second voltage. The driving capability of the second comparator circuit is reduced at the latching of the second voltage and is restored at the latching of the first voltage.

REFERENCES:
patent: 4479097 (1984-10-01), Larson et al.
patent: 5418502 (1995-05-01), Ma et al.
patent: 5570067 (1996-10-01), Shacter
patent: 6914494 (2005-07-01), Chen
patent: 7525394 (2009-04-01), Gerber et al.
patent: 2000-0018355 (2000-04-01), None

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