Quadrature direct synthesis discrete time multi-tone generator

Details Quadrature direct synthesis discrete time multi-tone generator Quadrature direct synthesis discrete time multi-tone generator

2006-06-27

2006-06-27

Gesesse, Tilahun (Department: 2684)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S233100, C455S227000, C455S231000

Reexamination Certificate

active

07069042

ABSTRACT:
A tone generator in a transceiver of a communications device may generate an arbitrary signal using two shift registers to generate the time intervals. During each time interval, a different capacitor is switched onto the node to change the voltage potential on that node. The amplitude of the waveform during each time interval is changed to provide the desired tone.

REFERENCES:
patent: 4334319 (1982-06-01), Gurry
patent: 4947171 (1990-08-01), Pfeifer et al.
patent: 5488629 (1996-01-01), Takahashi et al.
patent: 5742247 (1998-04-01), Chujo
patent: 6060924 (2000-05-01), Sugano

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