Title :
A new digital background calibration technique for pipelined ADC
Author :
El-Sankary, K. ; Sawan, M.
Author_Institution :
Dept. of Electr. Eng., Ecole Polytechnique de Montreal, Que., Canada
Abstract :
A digital background calibration technique to compensate for the finite opamps dc gain in pipelined analog-to-digital converters is presented. By transforming the ADC and measuring the gain ratios between different configurations, a background calibration is possible without interrupting the ADC operation or injecting a calibration signal. A modified multiplying digital-to-analog converter (MDAC) is proposed. This new MDAC allows the ADC to toggle between different configurations to create a reference signal used for the calibration. Simulations results prove the effectiveness of this new method.
Keywords :
analogue-digital conversion; calibration; pipeline processing; dc gain compensation; different configurations; digital background calibration; finite opamps; gain ratio measurements; multiplying digital-to-analog converter; pipelined ADC; reference signal; Analog-digital conversion; Bandwidth; CMOS technology; Calibration; Gain measurement; Laboratories; Performance gain; Signal generators; Signal processing; Voltage;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1328117
