Differential sensing current-steering analog-to-digital converte

Details Differential sensing current-steering analog-to-digital converte Differential sensing current-steering analog-to-digital converte

1991-02-19

1991-10-08

Scott, J. R.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

H03M 138

Patent

active

050558471

ABSTRACT:
An analog-to-digital converter utilizes both a successive approximation register and a current steering circuit within a digital-to-analog converter to achieve an improved conversion speed, and improved resolution for a predetermined amount of power. The current steering circuit, which is controlled by the successive approximation register, connects constant current sources to current source loads to produce a differential signal output. By steering current from the differential current source loads to the constant current sources, a signal difference resolves at the output of the digital-to-analog converter faster and with greater resolution.

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patent: 4961045 (1990-10-01), Gray et al.
patent: 5010337 (1991-04-01), Hisano et al.
IEEE Trans. on Circuits and Systems, "A Sigma-Delta Modulator as an A/D Converter", Van de Plassche, vol. cas-25, No. 7, Jul. 1978, pp. 510-514.
IEEE Journal Of Solid-State Circuits, "A Self-Calibration Technique for Monolithic High-Resolution D/A Converters", Groenveld et al., vol. 24, No. 6, Dec. 1989, pp. 1517-1522.

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