Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synthesizer
Patent
1997-04-17
1999-01-19
Le, Dinh
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synthesizer
327107, 327148, 327157, 360 60, 360 51, 331 1A, H03L 7085
Patent
active
058617663
ABSTRACT:
A frequency synthesizer has multiple modes of operation including a relatively short-duration frequency seek mode and a relatively long-duration normal mode. The synthesizer responds to a reference frequency signal and produces a periodic signal at a frequency that is a rational number times the frequency of the reference frequency signal. The synthesizer comprises a VCO, a feedforward state machine, a feedback state machine, a phase comparator, controllable gain circuitry between the phase comparator and the VCO, and logic circuitry that coordinates the operation of the feedforward and feedback state machines during the seek mode.
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Baumer Howard Anthony
Chung David Kyong-sik
Shearer Gerald Weslie
Le Dinh
Shara, Esq. Milad G.
Western Digital Corporation
Young, Esq. Leo J.
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