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Design of a CORDIC processor for mixed-signal A/D conversion

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4 Author(s)
M. B. Yeary ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; R. J. Fink ; H. Sundaresan ; D. W. Guidry

This paper proposes a new method which offers a high level of synchronization between a source, which is primarily digital, that generates a test signal and the analog-to-digital converter (ADC) that will sample it. By using a single clock to control the source, a clock divider may be used to derive a clock that will trigger an ADC at the appropriate times to produce a coherently sampled data set. Thus, the timing of the waveform and the ADC will be accurately synchronized; moreover, since test time is a valuable commodity, a predictable number of clock cycles can be issued in order to generate a sampled data set. A computer simulation is given which fully characterizes the theoretical aspects of this paper. In addition, selected laboratory measurements are also given for discussion.

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:51 ,  Issue: 4 )