Title :
A novel DPS integrator for fast CMOS imagers
Author :
Margarit, J.M. ; Sabadell, J. ; Terés, L. ; Serra-Graells, F.
Author_Institution :
Centra Nac. de Microelectron., Inst. de Microelectron. de Barcelona, Barcelona
Abstract :
A novel DPS integrator scheme for fast CMOS imagers is presented, which combines the advantages of analog APS and DPS circuits. The reset-insensitive integrator proposal improves the linearity of the ADC curve, while it allows both low-power consumption for the active blocks and low-voltage operation for the switching devices even at high frame rates. In this sense, a comparative study is presented in 0.18 mum 1-poly 6-metal 1.8 V CMOS technology to demonstrate the advantages of this novel solution.
Keywords :
CMOS image sensors; image convertors; switching convertors; A-D converters; ADC curve; CMOS imagers; DPS circuits; DPS integrator; active pixel sensors; analog APS; digital pixel sensors; low-power consumption; low-voltage operation; switching devices; CMOS analog integrated circuits; CMOS image sensors; CMOS technology; Capacitors; Counting circuits; Digital images; Linearity; Parasitic capacitance; Pixel; Sensor arrays;
Conference_Titel :
Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-1683-7
Electronic_ISBN :
978-1-4244-1684-4
DOI :
10.1109/ISCAS.2008.4541747
