Digital to analog converter having high multiplying bandwidth

Details Digital to analog converter having high multiplying bandwidth Digital to analog converter having high multiplying bandwidth

1992-03-06

1994-02-01

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341133, 341135, 341136, H03M 166

Patent

active

052835790

ABSTRACT:
A digital to analog converter (DAC) incorporates a novel subranging voltage output DAC that delivers high multiplying bandwidth while consuming low power and requires small silicon area. The higher order digital input bits (MSBS) select a voltage range (VMSB) from a first resistor divider DAC network. The VMSB is then applied to the input of a small high speed low power differential input single ended output LSB programmable attenuator amplifier. Transistor follower devices effectively buffer the MSB section to the LSB section and increase bandwidth and speed of operation as well as permitting multichannel sharing of a single precision MSB voltage divider network.

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Grzybowski, Waclaw et al. "nonlinear functions from d.-a. converters," Electronic Engineering Jul. 1971, pp. 48-51.

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