1
Wilfred Andre Maria Snijders, Nicolaas Alphonsus Maria Verhoeckx, Petrus Josephus VAN Gerwen, Hendrik Arie VAN Essen: Modulation and filtering device. U S Philips Corporation, Frank R Trifari, Simon L Cohen, January 11, 1977: US04003002 (146 worldwide citation)

A digital data transmitter is described, whose line carrier frequency need not be an integral multiple of one half the clock frequency of the digital input signal. Use is made of a digital filter for increasing the sampling frequency to a value which is twice the modulator carrier wave frequency.


2
Van Essen Hendrik A, Verhoeckx Nicolaas Am, Snijders Wilfred Am, Van Gerwen Petrus J: Dispositif de modulation et de filtration, Modulation and filtering device. Nv Philips Gloeilampenfabrieken, September 25, 1979: CA1063178

ABSTRACT: A digital data transmitter is described , whoseline carrier frequency need not be an intefral multiple ofone half the clock frequency of the digital input signal. Useis made of a digital filter for increasing the samplingfrequency to a value which is twice the modulator carrierwave frequen ...



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