Linearizing average transfer characteristics of ideal ADC's via analog and digital dither
- 1 April 1994
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 43 (2), 146-150
- https://doi.org/10.1109/19.293411
Abstract
This paper is a continuation to the previous work by M.F. Wagdy (see ibid., vol. 38, p. 850-855, Aug. 1989). It further investigates the effect of various dither forms, i.e., with different probability density functions (PDF's), on the average observed transfer characteristics of ideal A/D converters (ADC's). First the deviation of the ADC characteristics from the ideal straight line is evaluated for analog dither forms using the concept of nonlinearity spectra developed in the above work. Second, two cases of digital (discrete) dither are investigated, one with rectangular envelope and the other with triangular one. Effects of dither peak-to-peak values and number of PDF impulses are investigated. The paper provides a quantitative basis for replacing analog dither with the easier to implement digital dither.Keywords
This publication has 3 references indexed in Scilit:
- Validity of uniform quantization error model for sinusoidal signals without and with ditherIEEE Transactions on Instrumentation and Measurement, 1989
- Effect of various dither forms on quantization errors of ideal A/D convertersIEEE Transactions on Instrumentation and Measurement, 1989
- A necessary and sufficient condition for quantization errors to be uniform and whiteIEEE Transactions on Acoustics, Speech, and Signal Processing, 1977