DocumentCode
1891051
Title
Information transmission using a generalized chopper amplifier: Comparison of modulation schemes
Author
Nelson, Nicole ; Abshire, Pamela
Author_Institution
Dept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD
fYear
2009
fDate
18-20 March 2009
Firstpage
468
Lastpage
472
Abstract
In this paper we compare the capacity of different modulation schemes for a chopper amplifier. Using a simple theoretical model for noise we derive the capacity of unmodulated, chopper modulated and randomly modulated amplifiers. Experimental measurements of standard and randomly modulated amplifiers are performed and the information rates compared. When the chopping frequency is constrained to be the same, standard chopping provides higher information transmission than no modulation or random chopping.
Keywords
amplifiers; choppers (circuits); modulation; chopper amplifier; chopping frequency; information transmission; modulation schemes; 1f noise; Bandwidth; Choppers; Circuit noise; Colored noise; Cutoff frequency; Gaussian channels; Gaussian noise; Information rates; Low-frequency noise;
fLanguage
English
Publisher
ieee
Conference_Titel
Information Sciences and Systems, 2009. CISS 2009. 43rd Annual Conference on
Conference_Location
Baltimore, MD
Print_ISBN
978-1-4244-2733-8
Electronic_ISBN
978-1-4244-2734-5
Type
conf
DOI
10.1109/CISS.2009.5054766
Filename
5054766
Link To Document