Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Patent
1998-04-02
1999-12-07
Lam, Tuan T.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
327147, 327165, 375359, H03K 513
Patent
active
059990260
ABSTRACT:
Starting from an input signal (data) and a clock signal (clk), this device supplies an output signal (CKREF0) identical to the input signal but resynchronized with the clock signal. It comprises two cascaded D-type flip-flops (63, 65), the clock signal of the second flip-flop being inverted (62) with respect to that of the first flip-flop. The first flip-flop has its output coupled to the data input of the second flip-flop via a multiplexer (64), which is controlled by a signal (d-Ph) containing information about the phase relationship between the input signal and the clock signal, in such a manner that either input signal or the signal from the first flip-flop is applied to the input of the second flip-flop. This device can be used in a known phase control loop comprising an oscillator whose frequency is controllable, a frequency divider, and a phase comparator.
REFERENCES:
patent: 5212601 (1993-05-01), Wilson
patent: 5574756 (1996-11-01), Jeong
patent: 5638015 (1997-06-01), Gujral et al.
patent: 5781480 (1998-07-01), Nogle et al.
Marie Herve
Vorenkamp Pieter
Lam Tuan T.
U.S. Philips Corporation
Wieghaus Brian J.
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