Title :
A sub-nanoampere current differentiator
Author :
Chong, C.P. ; Salama, C.A.T. ; Smith, K.C.
Author_Institution :
Dept. of Electr. Eng., Toronto Univ., Ont.
Abstract :
A novel current differentiator capable of differentiating a step current with step size as low as 50 pA is described. It requires only four MOSFETs and consumes less than 10-8 W power. This makes the novel current differentiator, called the current-mirror (CM) differentiator, a suitable building block for the implementation of motion-detecting imagers with medium pixel density (≈60 pixels/mm2). The circuit has been implemented using 3 μm CMOS technology
Keywords :
CMOS integrated circuits; differentiating circuits; linear integrated circuits; 10 nW; 3 micron; 50 pA; CMOS technology; MOSFETs; current differentiator; current-mirror; monolithic IC; motion-detecting imagers; Animals; Delay; Image converters; Machine vision; Neurons; Pixel; Random access memory; Read-write memory; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN :
0-7803-0050-5
DOI :
10.1109/ISCAS.1991.176076
