Title :
Adaptation of current signals with floating-gate circuits
Author :
Pesavento, Alberto ; Horiuchi, Timothy ; Diorio, Chris ; Koch, Christof
Author_Institution :
Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA
Abstract :
In this paper we present a new, adaptive spatial-derivative circuit for use in CMOS image sensors. The circuit removes its offset as a natural part of its operation using a combination of electron tunneling and hot-electron injection to add or remove charge on a floating-gate of an auto-zeroing amplifier. We designed fabricated and successfully tested a chip with the circuit. Test results show that the circuit reduces the offsets by more than an order of magnitude
Keywords :
CMOS image sensors; VLSI; adaptive signal processing; analogue processing circuits; hot carriers; integrated circuit design; integrated circuit testing; CMOS image sensors; auto-zeroing amplifier; current signal adaptation; electron tunneling; floating-gate circuits; hot-electron injection; spatial-derivative circuit; CMOS technology; Circuit noise; Circuit testing; Computer science; Fabrication; Photoreceptors; Rain; Silicon; Tunneling; Very large scale integration;
Conference_Titel :
Microelectronics for Neural, Fuzzy and Bio-Inspired Systems, 1999. MicroNeuro '99. Proceedings of the Seventh International Conference on
Conference_Location :
Granada
Print_ISBN :
0-7695-0043-9
DOI :
10.1109/MN.1999.758855
