Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-12-19
1993-10-26
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307480, 328 63, 375111, 375118, H03K 513, H03K 301, H04L 700
Patent
active
052569128
ABSTRACT:
The present invention, a synchronizer, utlizes a plurality of clocking signals generated by a specialized clocking circuit, in conjunction with synchronizer modules incorporating transparent latches, to synchronize signals passing from a first clock domain to a second clock domain. Two types of synchronizer modules are disclosed, a single synchronizer module and a multiple synchronizer module. Both types of synchronizer modules utilize a "basic synchronizer cell" comprised of two transparent latches in series. The single synchronizer module is comprised of two such basic synchronizer cells, and utilizes a plurality of clocking signals which are coupled to the transparent latches to accomplish synchronization. The multiple synchronizer module, also utilizes a plurality of clocking signals, and is comprised of a plurality of single synchronizer modules coupled in parallel and a synchronizer selector circuit. The multiple synchronizer module operates by initially coupling the signal to be synchronized to the synchronizer selector circuit, which then sequentially couples the signal to successive single synchronizer modules.
REFERENCES:
patent: 4039960 (1977-08-01), Clark
patent: 4879481 (1989-11-01), Pathak et al.
patent: 4949361 (1990-08-01), Jackson
patent: 5022057 (1991-06-01), Nishi et al.
patent: 5132990 (1992-07-01), Dukes
Callahan Timothy P.
Sun Microsystems Inc.
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