04003002 is referenced by 145 patents.

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.

Title
Modulation and filtering device
Application Number
5/608392
Publication Number
4003002
Application Date
August 27, 1975
Publication Date
January 11, 1977
Inventor
Hendrik Arie VAN Essen
Eindhoven
NL
Petrus Josephus VAN Gerwen
Eindhoven
NL
Nicolaas Alphonsus Maria Verhoeckx
Eindhoven
NL
Wilfred Andre Maria Snijders
Eindhoven
NL
Agent
Simon L Cohen
Frank R Trifari
Assignee
U S Philips Corporation
NY, US
IPC
H03K 7/00
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