Chopper modulation improves OTA information transmission

Nicole M. Nelson; Pamela A. Abshire

doi:10.1109/iscas.2007.378841

Chopper modulation improves OTA information transmission

Nicole M. Nelson
, Pamela A. Abshire

Electrical Engineering

University of Maryland, College Park

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Scopus citations

Abstract

We have investigated information transmission in operational transconductance amplifiers (OTA) using chopper modulation. Previous work showed that the optimal frequency bandwidth for an OTA was much higher than typical operating frequencies. Here we analyze the information transfer rates for a folded cascode amplifier and a chopper modulated folded cascode amplifier using the principles of information theory. The frequency transfer characteristic and intrinsic physical noise source of each device is modeled using process dependent noise parameters and the waterfilling technique is applied to determine the capacity as well as information rates for low frequency signals. Simulations are experimentally verified using circuits fabricated in a commercially available 3-metal, 2-poly 0.5 μm CMOS process.

Original language	English
Title of host publication	2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2275-2278
Number of pages	4
ISBN (Print)	1424409209
DOIs	https://doi.org/10.1109/iscas.2007.378841
State	Published - 2007
Event	2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007 - New Orleans, LA, United States Duration: May 27 2007 → May 30 2007

Publication series

Name	Proceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)	0271-4310

Conference

Conference	2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007
Country/Territory	United States
City	New Orleans, LA
Period	05/27/07 → 05/30/07

Access to Document

10.1109/iscas.2007.378841

Cite this

Nelson, N. M., & Abshire, P. A. (2007). Chopper modulation improves OTA information transmission. In 2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007 (pp. 2275-2278). Article 4253128 (Proceedings - IEEE International Symposium on Circuits and Systems). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/iscas.2007.378841

@inproceedings{0178f5b9279d436aaed9162205da6e7b,

title = "Chopper modulation improves OTA information transmission",

abstract = "We have investigated information transmission in operational transconductance amplifiers (OTA) using chopper modulation. Previous work showed that the optimal frequency bandwidth for an OTA was much higher than typical operating frequencies. Here we analyze the information transfer rates for a folded cascode amplifier and a chopper modulated folded cascode amplifier using the principles of information theory. The frequency transfer characteristic and intrinsic physical noise source of each device is modeled using process dependent noise parameters and the waterfilling technique is applied to determine the capacity as well as information rates for low frequency signals. Simulations are experimentally verified using circuits fabricated in a commercially available 3-metal, 2-poly 0.5 μm CMOS process.",

author = "Nelson, \{Nicole M.\} and Abshire, \{Pamela A.\}",

year = "2007",

doi = "10.1109/iscas.2007.378841",

language = "English",

isbn = "1424409209",

series = "Proceedings - IEEE International Symposium on Circuits and Systems",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "2275--2278",

booktitle = "2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007",

note = "2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007 ; Conference date: 27-05-2007 Through 30-05-2007",

}

Nelson, NM & Abshire, PA 2007, Chopper modulation improves OTA information transmission. in 2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007., 4253128, Proceedings - IEEE International Symposium on Circuits and Systems, Institute of Electrical and Electronics Engineers Inc., pp. 2275-2278, 2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007, New Orleans, LA, United States, 05/27/07. https://doi.org/10.1109/iscas.2007.378841

Chopper modulation improves OTA information transmission. / Nelson, Nicole M.; Abshire, Pamela A.
2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007. Institute of Electrical and Electronics Engineers Inc., 2007. p. 2275-2278 4253128 (Proceedings - IEEE International Symposium on Circuits and Systems).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Chopper modulation improves OTA information transmission

AU - Nelson, Nicole M.

AU - Abshire, Pamela A.

PY - 2007

Y1 - 2007

N2 - We have investigated information transmission in operational transconductance amplifiers (OTA) using chopper modulation. Previous work showed that the optimal frequency bandwidth for an OTA was much higher than typical operating frequencies. Here we analyze the information transfer rates for a folded cascode amplifier and a chopper modulated folded cascode amplifier using the principles of information theory. The frequency transfer characteristic and intrinsic physical noise source of each device is modeled using process dependent noise parameters and the waterfilling technique is applied to determine the capacity as well as information rates for low frequency signals. Simulations are experimentally verified using circuits fabricated in a commercially available 3-metal, 2-poly 0.5 μm CMOS process.

AB - We have investigated information transmission in operational transconductance amplifiers (OTA) using chopper modulation. Previous work showed that the optimal frequency bandwidth for an OTA was much higher than typical operating frequencies. Here we analyze the information transfer rates for a folded cascode amplifier and a chopper modulated folded cascode amplifier using the principles of information theory. The frequency transfer characteristic and intrinsic physical noise source of each device is modeled using process dependent noise parameters and the waterfilling technique is applied to determine the capacity as well as information rates for low frequency signals. Simulations are experimentally verified using circuits fabricated in a commercially available 3-metal, 2-poly 0.5 μm CMOS process.

UR - https://www.scopus.com/pages/publications/34548819651

U2 - 10.1109/iscas.2007.378841

DO - 10.1109/iscas.2007.378841

M3 - Conference contribution

AN - SCOPUS:34548819651

SN - 1424409209

T3 - Proceedings - IEEE International Symposium on Circuits and Systems

SP - 2275

EP - 2278

BT - 2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007

Y2 - 27 May 2007 through 30 May 2007

ER -

Chopper modulation improves OTA information transmission

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