Three-level digital-to-analog converter for low-power consumptio

Details Three-level digital-to-analog converter for low-power consumptio Three-level digital-to-analog converter for low-power consumptio

1994-12-28

1997-03-04

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341143, H03M 166

Patent

active

056084013

ABSTRACT:
A three-level digital-to-analog (D/A) converter receives digital signals, derives three-level control signals and generates analog signals. The three-level D/A converter comprises a control device for converting incoming digital signals to control signals having three levels, switches for switching responsive to these three levels to control a network of switches, and a load responsive to these switches to generate corresponding analog signals. The control device comprises a feedback control loop and a quantizer to produce the control signals having High, Medium and Low levels. The switches are preferably four switches that open and close cooperatively in response to the High, Medium and Low levels. The load generates a positive, zero or negative voltage reference in the analog signals in response to the operation of the four switches.

REFERENCES:
patent: 5134402 (1992-07-01), Miyoshi
patent: 5160896 (1992-11-01), McCorkle
patent: 5206648 (1993-04-01), Yukawa
patent: 5257026 (1993-10-01), Thompson et al.
patent: 5274375 (1993-12-01), Thompson
patent: 5406283 (1995-04-01), Leung
IEEE International Solid State Circuits Conference, vol. 34, 1 Feb. 1991, pp. 74-75, 293, Toshiyuki Okamoto, "A 16b Oversampling CODEC with Filtering DSP".
European Search Report, Nov. 4, 1996.

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