Title :
Systematic approach to the digital compensation for deterministic nonideal characteristics in ΣΔ modulation
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong
fDate :
9/1/1998 12:00:00 AM
Abstract :
In this work we propose a systematic approach to the digital compensation for nonideal deterministic characteristics in a ΣΔ modulator. It is based on inverting the complete nonlinear deterministic transfer function of the modulator. This operation leads us to a whole set of possible reconstruction estimates from which we systematically pick the geometric center as signal decoding scheme. This approach already proves effective in the particular case of static deviations in the built-in analog-to-digital converter and digital-to-analog converter of the modulator
Keywords :
compensation; decoding; modulators; sigma-delta modulation; transfer functions; ΣΔ modulation; analog-to-digital converter; built-in ADC; built-in DAC; deterministic nonideal characteristics; digital compensation; geometric center; modulator; onlinear deterministic transfer function; reconstruction estimates; signal decoding scheme; transfer function inversion; Active filters; Active noise reduction; Band pass filters; Dynamic range; Frequency; MOSFET circuits; Operational amplifiers; Q factor; Signal to noise ratio; Solid state circuits;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
