Stability and performance analysis of an adaptive sigma-delta modulator

This work develops an adaptive sigma-delta modulator that is based on adapting the quantizer step-size using estimates of the quantizer input rather than the modulator input. The adaptive modulator with a first-order noise shaping filter is shown to be bounded-input bounded-output stable. Moreover, an analytical expression for the signal-to-noise ratio is derived, and it is shown to be independent of the input signal strength. Simulation results confirm the signal-to-noise ratio performance and indicate considerable improvement in the dynamic range of the modulator compared to earlier structures.


Published in:
IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 48, 3, 233-244
Year:
2001
Publisher:
IEEE
ISSN:
1057-7130
Laboratories:




 Record created 2017-12-19, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)