Current comparison becomes critical in those data conversion systems where it is highly desirable to achieve speed without sacrificing either accuracy or power consumption. This paper presents a novel circuital solution to perform current comparison at very high speed. Furthermore, we deal with the comparator input offset causes proposing a mismatch aware design to get the desired accuracy. The comparator consists of a fully differential class-AB current input stage, two regenerative flip-flops, and an SR latch. We simulated the circuit in a 0.13 mu m technology with 1.2V supply voltage. The comparator speed can be pushed up to 1.SGHz achieving a current difference sensitivity up to 20nA and only 800 mu A of both static and dynamic current consumption
Giannini, V., Craninckx, J., Come, B., Malcovati, P., Baschirotto, A. (2006). 1.5GHz fully differential latched current comparator with 20nA of sensitivity. In Research in Microelectronics and Electronics 2006, Ph. D. (pp.181-184) [10.1109/RME.2006.1689926].
1.5GHz fully differential latched current comparator with 20nA of sensitivity
BASCHIROTTO, ANDREA
2006
Abstract
Current comparison becomes critical in those data conversion systems where it is highly desirable to achieve speed without sacrificing either accuracy or power consumption. This paper presents a novel circuital solution to perform current comparison at very high speed. Furthermore, we deal with the comparator input offset causes proposing a mismatch aware design to get the desired accuracy. The comparator consists of a fully differential class-AB current input stage, two regenerative flip-flops, and an SR latch. We simulated the circuit in a 0.13 mu m technology with 1.2V supply voltage. The comparator speed can be pushed up to 1.SGHz achieving a current difference sensitivity up to 20nA and only 800 mu A of both static and dynamic current consumption
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