Method and system for digital to analog conversion

Details Method and system for digital to analog conversion Method and system for digital to analog conversion

1999-03-01

2000-11-21

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341110, H03M 166

Patent

active

061509701

ABSTRACT:
A digital to analog converter according to the principles of the invention provides increased dynamic range by utilizing multiple digital to analog converters (DACs) to provide a balanced output. On the positive side of the topology, two or more DACs connect in parallel to a digital input. A summer adds the DAC outputs to provide the positive side of the balanced output. On the negative side, an inverter provides the negative of the digital input to two or more DACs connected in parallel. A summer adds the DAC outputs to provide the negative side of the balanced output. The averaging effect of the summing operations reduces noise due to random errors, thereby increasing the dynamic range achievable with one DAC. The balanced design of the topology and the use of highly matched components for the positive and negative sides assure that common mode errors, noise and distortion are reduced as well.

REFERENCES:
patent: 5539403 (1996-07-01), Tani et al.
patent: 5689259 (1997-11-01), Ozguc
patent: 5815103 (1998-09-01), Comminges et al.
patent: 5880689 (1999-03-01), Kushner

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