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Publication numberUS3665314 A
Publication typeGrant
Publication dateMay 23, 1972
Filing dateAug 21, 1970
Priority dateAug 21, 1969
Publication numberUS 3665314 A, US 3665314A, US-A-3665314, US3665314 A, US3665314A
InventorsLeuthold Peter
Original AssigneePhilips Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Communications system comprising a matrix network of modulation elements
US 3665314 A
Abstract  available in
Images(19)
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Claims  available in
Description  (OCR text may contain errors)

United States Patent Leuthold [4 May 23, 1972 [54] COMMUNICATIONS SYSTEM 325/41, 42, 38 R, 38 A, 38 B, 40, 135-138, 141, 48,

COMPRISING A MATRIX NETWORK 1 1 OF 340/1461, 147, 147 Ps; ]79/l5; 328/41, 43, 46, 5501, [72] Inventor: Peter Leuthold, Erlenbach, Switzerland 56 R e Cited [73] Assignee: U.S. Philips Corporation, New York, NY. I 1 e Races 22 Filed: Aug. 21, 1970 U] l ED STATES PATENTS 3,484, 0 l2 l9 9 C al. pp NO: 65,968 55 6 oulter et 178/23 Primary Examiner-Robert L. Richardson F A 60 W Data Assistant Examiner-Albert J. Mayer [30] PM m n Attorney-Frank R. Trifari Aug. 21, I969 Switzerland ..l2694/69 June 26, 1970 Switzerland ..97l2/70 [57] ABSTRACT In a transmission system a shift register controlled modulator [52] U.S. CI ..325/l4l, 325/136, 325/l37, matrix is employed to filter unwanted modulation products 325/138, 325/143, 328/43, 328/61 from the frequency band [51] Int. Cl. H04b 1/04 [58] Field ofSearch ..178/23 R; 325/38, 38 A, 39, 20Claims,24Drawingfigu1-es SOURC MULT SHIFT REG. J l 17 -MOD ELEMENT PATENTEDMAY 23 1912 3,665,314

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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3793589 *Jun 28, 1972Feb 19, 1974Gen ElectricData communication transmitter utilizing vector waveform generation
US3904965 *Sep 19, 1973Sep 9, 1975Philips CorpArrangement for information transmission
US4618966 *Jun 1, 1983Oct 21, 1986Cincinnati Electronics CorporationFrequency shift key modulator
US5253271 *Feb 15, 1991Oct 12, 1993Schlumberger Technology CorporationMethod and apparatus for quadrature amplitude modulation of digital data using a finite state machine
US5257282 *Jun 28, 1984Oct 26, 1993Unisys CorporationHigh speed code sequence generator
US5583784 *May 12, 1994Dec 10, 1996Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V.Frequency analysis method
Classifications
U.S. Classification375/270, 327/294, 375/301, 375/285, 375/272
International ClassificationH04L27/04, H04L27/02
Cooperative ClassificationH04L27/04
European ClassificationH04L27/04