Frequency divider

Details Frequency divider Frequency divider

2007-11-06

2010-10-12

Nguyen, Hai L (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C327S115000

Reexamination Certificate

active

07812648

ABSTRACT:
A frequency divider using a clock source with a plurality of phase signals of a multi-phase oscillator. In one version, the divider includes a plurality of spot-moving stages that are connected to form a ring. Spot-moving stages are stages that advance a one or a zero, while clearing the previous stage. Depending on the number of stages and the number of phases of the clock to advance a spot through all of the stages, a divider ratio is determined. In another embodiment, a plurality of latch elements is provided with a divided input and each is re-clocked with the phases of a multi-phase oscillator. The outputs of the latch elements are combined in a capacitor array to create the output waveform. An interpolator useful in conjunction with a frequency divider is also disclosed. When the interpolator is placed in the feedback path of a PLL, a fractional frequency multiplier/divider results.

REFERENCES:
patent: 5390223 (1995-02-01), Lindholm
patent: 5442670 (1995-08-01), Shu
patent: 5495206 (1996-02-01), Hietala
patent: 6469549 (2002-10-01), Carson et al.
patent: 6965259 (2005-11-01), Saeki
patent: 7332945 (2008-02-01), Hu
patent: 7425850 (2008-09-01), Widerin
patent: 2005/0225365 (2005-10-01), Wood
Yang, Lixin, et al.: “A Non-Feedback Multiphase Clock Generator”, IEEE International Symposium on Circuits and Systems, ISCAS 2002, 4 pages.
International Search Report from PCT/US07/64562 dated Feb. 27, 2008.

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