Pulse or digital communications – Repeaters – Testing
Patent
1992-05-05
1994-06-28
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
341143, H04B 1406
Patent
active
053253990
ABSTRACT:
In a digital sigma-delta modulator with multi-phase operations by time-sharing including an adder to produce multiple integration, an arrangement includes switching circuitry for alternately establishing one of: a connection between a first input of the adder and an input of the modulator; and connections between the adder output and the first input of the adder by way of a first integration delay circuit, and the adder output and a second input of the adder by way of a second delay circuit.
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patent: 5068659 (1991-11-01), Sakaguchi
Boser et al., "The Design of Sigma-Delta Modulation Analog-to-Digital Converters," IEEE Journal of Solid-State Circuits, vol. 23, No. 6, Dec. 1988, pp. 1298-1308.
Everard, "A Single-Channel PCM Codec," IEEE Transactions on Communications, vol. COM-27, No. 2, Feb. 1979, pp. 283-295.
Agrawal et al., "Design Methodology for .epsilon..DELTA.M," IEEE Communications Society International Conference on Acoustics . . . , Paris, France, May 1982, pp. 360-369.
Friedman et al., "A Dual-Channel Voice-Band PCM Codec Using .epsilon..DELTA. Modulation Technique," IEEE Journal of Solid-State Circuits, vol. 24, No. 2, Apr. 1989, pp. 274-280.
Candy, "A Use of Double Integration in Sigma Delta Modulation," IEEE Transactions on Communications, vol. Com-33, No. 3, Mar. 1985, pp. 249-258.
Haspeslagh Didier R.
Moerman Erik
Alcatel N.V.
Bocure Tesfaldet
Chin Stephen
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