Boots – shoes – and leggings
Patent
1995-03-16
1997-02-18
Envall, Jr., Roy N.
Boots, shoes, and leggings
364607, 331 40, 455 76, G06F 107
Patent
active
056046901
ABSTRACT:
A signal form synthesizer comprises a digital generator circuit (1) for generating the synthesis signal to produce a first series of digital samples which are representative of this signal and formed by binary words of N bits, and a digital-to-analog converter circuit (30) for producing an analog version of this signal. Furthermore, there is provided an assembly (40) for filtering in accordance with a band-pass characteristic curve the samples of the first series and for supplying to said digital-to-analog converter circuit (30) a second series of samples formed by binary words of N' bits, where N.gtoreq.N'. A negative feedback loop (45) subtracts the samples of the second series from the samples of the first series.
REFERENCES:
patent: 4380743 (1983-04-01), Underhill et al.
patent: 4704585 (1987-11-01), Lind
patent: 5014231 (1991-05-01), Reinhardt et al.
patent: 5311560 (1994-05-01), Tatsumi et al.
patent: 5335365 (1994-08-01), Ballantyne et al.
Bellanger, "Tratement Numerique Du Signal", Collection Technique Et Scientifique Des Telecommunications, 2nd Edition, Mexico 1984, pp. 188-266, Chapters 11 and 12.
Envall Jr. Roy N.
Moise Emmanuel L.
Rosenthal Eugene J.
U.S. Philips Corporation
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