Title :
A single-chip optical sensor with analog memory for motion detection
Author :
Simoni, Andrea ; Torelli, Guido ; Maloberti, Franco ; Sartori, Alvise ; Plevridis, Sofoklis E. ; Birbas, Alexios N.
Author_Institution :
Istituto per la Ricerca Sci. e Tecnologica, Trento, Italy
fDate :
7/1/1995 12:00:00 AM
Abstract :
A 64×64-pixel image sensor with full-frame analog memory and on-chip motion processor is presented. The processor consists of a charge amplifier and an analog subtractor. It uses the switched-capacitor technique and calculates the difference between the values of the signal on each pixel in successive frames. The rate can achieve up to 60 frames/s with limited area and power overhead. The analog memory required for the storage of the previous frame is implemented using implanted capacitors placed within the sensor array. Fabricated in a 1.2-μm standard CMOS process with an added metal 3 light-shielding layer, the circuit is fully functional and requires a total core area of 13 mm2
Keywords :
CMOS analogue integrated circuits; analogue processing circuits; analogue storage; intelligent sensors; motion estimation; optical sensors; switched capacitor networks; 1.2 micron; 4096 pixel; 64 pixel; analog subtractor; area overhead; charge amplifier; core area; full-frame analog memory; implanted capacitors; light-shielding layer; motion detection; on-chip motion processor; power overhead; sensor array; single-chip optical sensor; switched-capacitor technique; Analog memory; Capacitive sensors; Capacitors; Circuits; Intelligent sensors; Intelligent systems; Motion detection; Optical amplifiers; Optical sensors; Sensor arrays;
Journal_Title :
Solid-State Circuits, IEEE Journal of
