Pulse or digital communications – Repeaters – Testing
Patent
1996-12-26
1999-03-23
Pham, Chi H.
Pulse or digital communications
Repeaters
Testing
375343, 36472411, H04B 1500, H04K 100, H04L 2730
Patent
active
058870245
ABSTRACT:
The present invention provides a matched filter which can refresh an entire while keeping the speed of a calculation comparable to a small sized circuit. The first and second addition circuits of a matched filter of the present invention are classified into a plurality of groups, the first and second auxiliary adders replace functions for the groups of the first and second adders respectively. The outputs of the first and second adders are then inputted to the first and second subtractors, respectively, and the refreshing means appropriately refreshes the groups replaced by the first and second auxiliary adders. Further, the present invention decreases the number of auxiliary sapling and holding circuits to be used, and decides the refreshing intervals by considering the change of the voltage caused by leakage and other permissible errors of output voltage.
REFERENCES:
patent: 4519084 (1985-05-01), Langseth
patent: 4808939 (1989-02-01), Kingston
patent: 5293398 (1994-03-01), Hamao et al.
patent: 5715276 (1998-02-01), Tran et al.
Tanaka et al, "Development of Low Power Consumption LSI fo SS Communication", Technical Report of IEICE SST95-77(1995-10) pp. 31-36.
Ogawa et al, "Development of 1 Chip SS Communication LSI Using Digital Matched Filgers" Technical Report of IEICE, ISEC92-42 SST94-65 (1994-12) pp. 33-38.
"Dual 64-TAP, 11 Mcps, Digital Matched Filter/Correlator, Stel-3310" Stanford Telecommunications ASIC & Custom Products Group pp. 126 and 130.
Chen Jie
Qin Xiaoling
Shou Guoliang
Suzuki Kunihiko
Zhou Changming
Pham Chi H.
Sharp Kabushiki Kaisha
Webster Bryan
Yozan Inc.
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