Large range, high speed, high accuracy digital-to-analog convert

Details Large range, high speed, high accuracy digital-to-analog convert Large range, high speed, high accuracy digital-to-analog convert

1990-07-30

1991-03-05

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341142, H03M 166

Patent

active

049981080

ABSTRACT:
A digital-to-analog converter system includes a logic system which receives input signals, receives an increment/decrement signal, and provides a digital word composed of most significant bits and least significant bits. The system includes two DACs haaving separate data rates and ranges for converting the most significant bits and the least significant bits, respectively, the data rate of the second DAC being greater than the data rate of the first DAC. Combining circuitry produces an analog signal representative of the digital word from the first and second analog outputs. The data rate of the combined output may be as fast as the data rate of the second DAC, and the range of the combined output may be as large as the range of the first DAC. The system also includes track and hold circuitry which holds the value of the output of the first DAC until glitches are settled.

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