A 32-channel front-end for wireless HID using inverse-STF pre-filtering technique

Author

Galal, Sherif ; Van Engelen, Jurgen ; Welz, Jared ; Jensen, Henrik ; Abdelfattah, Khaled ; Cheung, Felix ; Arunachalam, Sasi Kumar ; Jiang, Xicheng ; Brooks, Todd

Author_Institution

Broadcom Corp., Irvine, CA, USA

fYear

2010

fDate

19-22 Sept. 2010

Firstpage

1

Lastpage

4

Abstract

A 32-channel front-end circuit for wireless Human Interface Devices (HID) is described. The front-end incorporates a Sigma-Delta ADC combined with an inverse-STF pre-filtering technique to achieve 10.8 ENOB at a conversion rate of 7.5μs per channel. Chopping and digital calibration are employed to achieve an offset voltage <; 850μV and gain error <; 0.17%. The HID front-end measures single-ended rail-to-rail inputs with 1.62V to 3.63V supply range, occupies 0.28mm² in 65nm CMOS and consumes 1.8mW from 1.2V supply.

Keywords

filtering theory; radiocommunication; sigma-delta modulation; telecommunication computing; user interfaces; ENOB; HID front-end; digital calibration; front-end circuit; inverse-STF pre-filtering technique; inverse-STF prefiltering technique; offset voltage; sigma-delta ADC; single-ended rail-to-rail inputs; wireless HID; wireless human interface devices; Calibration; Capacitors; Digital filters; Matched filters; Noise; Switches; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference (CICC), 2010 IEEE

Conference_Location

San Jose, CA

ISSN

0886-5930

Print_ISBN

978-1-4244-5758-8

Type

conf

DOI

10.1109/CICC.2010.5617595

Filename

5617595