Title :
A synchronous chopping technique and implementation for high-frequency precision sensing
Author :
Rahal, Mohamad ; Demosthenous, Andreas
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London, London
Abstract :
A new architecture front-end for high-frequency electronic sensing is introduced. The architecture combines synchronous detection with chopping in a fully-differential topology. The proposed technique does not require the offset to be measured before a measurement is taken as in the prior art through the use of a microcontroller. An integrated circuit was designed in a 0.35-mum CMOS technology and tested with high-frequency inductive position sensors. The typical input-referred offset is 87 muV at a chopping frequency of 500 kHz.
Keywords :
CMOS integrated circuits; microcontrollers; sensors; CMOS technology; architecture front-end; frequency 500 kHz; fully-differential topology; high-frequency electronic sensing; high-frequency inductive position sensors; high-frequency precision sensing; integrated circuit; microcontroller; size 0.35 mum; synchronous chopping technique; synchronous detection; Art; CMOS integrated circuits; CMOS technology; Circuit testing; Circuit topology; Frequency; Integrated circuit measurements; Integrated circuit technology; Integrated circuit testing; Microcontrollers;
Conference_Titel :
Solid-State Circuits Conference, 2008. ESSCIRC 2008. 34th European
Conference_Location :
Edinburgh
Print_ISBN :
978-1-4244-2361-3
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2008.4681891
