Title :
Characterization and compensation of nonlinearities in a continuous-time first-order ΣΔ ADC
Author :
Schmidt, C. ; Cousseau, J.E. ; Figueroa, J.L. ; Wichman, R. ; Werner, S.
Author_Institution :
Inst. de Investig. en Ing. Electr., UNS CONICET, Bahia Blanca, Argentina
Abstract :
We present an approach for compensating nonlinearities in a continuous-time (CT) first-order sigma-delta converter (SDC) with one bit quantization. A reduction of an order of magnitude is obtained in the measured squared error when compared to the uncompensated SDC. Our results confirm a significant improvement in Signal to Noise and Distortion Ratio (SINAD) for single tone input signals and in Spurius Free Dynamic Range (SFDR) for multi-tone inputs.
Keywords :
compensation; sigma-delta modulation; bit quantization; continuous-time first-order ΣΔ ADC; nonlinearity compensation; sigma-delta converter; signal to noise and distortion ratio; spurius free dynamic range; Circuit simulation; Delta-sigma modulation; Dynamic range; Latches; Mathematical model; Nonlinear distortion; Polynomials; Quantization; Signal processing; Table lookup; Compensation; memory polynomial; nonlineari-ties; sigma-delta ADCs;
Conference_Titel :
RF Front-ends for Software Defined and Cognitive Radio Solutions (IMWS), 2010 IEEE International Microwave Workshop Series on
Conference_Location :
Aveiro
Print_ISBN :
978-1-4244-5751-9
DOI :
10.1109/IMWS.2010.5440997
