Phase synchronous circuit

Details Phase synchronous circuit Phase synchronous circuit

2005-07-15

2008-09-09

Cox, Cassandra (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S152000

Reexamination Certificate

active

07423461

ABSTRACT:
An external clock round-trips a round-trip delay block configured by a selector and a short delay array, and is made capable of corresponding to a wide frequency by generating a long delay time required for synchronization at the time of a low frequency operation. Further, when a plurality of phase comparators are disposed, in both cases where comparing phases all at once and comparing phases one after another, it is possible to complete the phase synchronization within a short time by making a delay amount variable.

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Takanori Saeki et al. , “A 2.5-ns Clock Access, 250-MHz, 256-Mb SDRAM with Synchronous Mirror Delay” IEEE Journal of Solid-state Circuits, vol. 31, No. 11, Nov. 1996, pp. 1656-1668.

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