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Giles George R, Shuda Donald G, MacDavid Kenneth R: Data modulator employing sinusoidal synthesis. Sanders Associates, November 23, 1971: US3623160 (93 worldwide citation)

Multitone data-transmitting apparatus employing sinusoidal synthesis with harmonic cancellation. A multitone data transmitter employs relative phase displacements between plural digital waveforms all of which are representative of a tone to be transmitted and a weighted summing network for summing t ...


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Data modulator employing sinusoidal synthesis. Sanders Associates, December 20, 1972: GB1300807-A (1 worldwide citation)

1300807 Data transmission systems SANDERS ASSOCIATES Inc 8 Sept 1970 [17 Sept 1969] 43035/70 Heading H4P An F.S.K. modulator comprises a circuit 14 adapted to produce tone encoded signals, a square wave generating circuit 15 responsive to the tone encoded signals to produce four phase displaced squa ...


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