DocumentCode
2400594
Title
High Resolution CMOS Current Comparators
Author
Domínguez-Castro, R. ; Rodríguez-Vázquez, A. ; Medeiro, F. ; Huertas, J.L.
Author_Institution
Dept. of Analog Design, CNM, Sevilla, Spain
fYear
1992
fDate
21-23 Sept. 1992
Firstpage
242
Lastpage
245
Abstract
A 2μm CMOS current comparator prototype is presented with an input current comparison range of 140dB and virtual zero offset (<;10pA). The circuit uses capacitive sensing for high resolution and nonlinear feedback to achieve small input voltage variations in the complete input current range. Operation speed for low current is about two orders of magnitude larger than for conventional circuits. Simplified modeling issues are used to compare alternative comparator architectures.
Keywords
CMOS integrated circuits; capacitive sensors; current comparators; capacitive sensing; high resolution CMOS current comparators; nonlinear feedback; size 2 mum; Analog-digital conversion; CMOS technology; Circuit testing; Digital signal processing; Feedback circuits; Impedance; Semiconductor device modeling; Signal resolution; Virtual prototyping; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid-State Circuits Conference, 1992. ESSCIRC '92. Eighteenth European
Conference_Location
Copenhagen
Print_ISBN
87-984232-0-7
Type
conf
DOI
10.1109/ESSCIRC.1992.5468214
Filename
5468214
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