Title :
A continuous-time incremental analog to digital converter
Author :
Doldán, Ricardo ; Yúfera, Alberto ; Rueda, Adoración
Author_Institution :
Instituto de Microelectron. de Sevilla, Seville Univ., Spain
Abstract :
In this paper an incremental analog-to-digital converter (ADC), designed as part of the signal-conditioning circuitry for a tissue impedance measurement system, is presented. Continuous-time design techniques have been used for the development of a modified implementation of the conversion algorithm, with respect to its discrete-time counterpart. In order to reduce the influence of the nonidealities, analog and digital corrections have been also implemented. A first prototype in 0.8 μm CMOS technology has been fabricated and tested. Simulation and experimental results are reported.
Keywords :
CMOS integrated circuits; analogue-digital conversion; biomedical measurement; circuit simulation; continuous time systems; integrated circuit design; integrated circuit measurement; integrated circuit modelling; operational amplifiers; 0.8 micron; 12 bit; CMOS continuous-time incremental ADC; OTA-C techniques; analog-to-digital converters; analog/digital correction nonideality reduction; continuous-time design techniques; discrete-time conversion; modified conversion algorithm implementation; tissue impedance measurement system signal-conditioning circuitry; Analog-digital conversion; Clocks; Counting circuits; Delta-sigma modulation; Digital control; Digital integrated circuits; Integrated circuit modeling; Signal processing; Signal processing algorithms; Voltage;
Conference_Titel :
Integrated Circuits and Systems Design, 2002. Proceedings. 15th Symposium on
Print_ISBN :
0-7695-1807-9
DOI :
10.1109/SBCCI.2002.1137638
