Crystal oscillator circuit with activation control

Details Crystal oscillator circuit with activation control Crystal oscillator circuit with activation control

2006-06-06

2006-06-06

Pascal, Robert J. (Department: 2817)

Oscillators

Combined with particular output coupling network

C331S182000, C327S291000, C327S299000

Reexamination Certificate

active

07057468

ABSTRACT:
A CMOS Pierce crystal oscillator. A clock generator with activation control, for generating a clock signal. The clock generator comprises an amplifier, a shaping circuit and a diagnostic circuit. The amplifier is capable of being coupled to an external oscillation source through an input pad and an output pad to generate an oscillating signal, the shaping circuit is capable of being coupled to the output pad, for shaping the oscillating signal to generate a clock signal, and the diagnostic circuit is capable of being coupled to the output pad, for asserting a ready signal when amplitude of the oscillating signal exceeds a predetermined portion of a full swing voltage.

REFERENCES:
patent: 5568100 (1996-10-01), Locanthi
patent: 5774006 (1998-06-01), Barel et al.
patent: 6803833 (2004-10-01), Yen et al.

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