High Speed Curve Interpolating D/A Converter |
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Authors: | Hongwei Wang Cheong-fat Chan Chiu-sing Choy |
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Affiliation: | (1) Solomon Systech Limited, 6/F No. 3 Science Park East Avenue, Hong Kong Science Park, Pak Shek Kok, N.T., Hong Kong;(2) Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong |
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Abstract: | This paper presents a design of high speed curve interpolating D/A converter. We improve 8-bit data to 12-bit data, so the data resolution increases 16 times than that of original 8-bit data. The curve interpolator is developed from the linear interpolator. The simulation speed curve interpolator is about 500 MHz. The chip is fabricated by 0.8 m double-metal single poly CMOS technology. The active interpolation size of chip is 1 × 1 mm2. The power dissipation is 200 mWatts at 5volt and 500 MHz for simulation result and 80 mWatts at 5 volt and 50 MHz for measurement result. The errors of interpolating result of curve interpolators are about 20 times less than that of original signal. |
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Keywords: | interpolation interpolator linear curve ADC DAC DSP VLSI digital circuits |
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