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

Stony Brook University

University of Maryland, College Park

Research output: Contribution to journal › Conference article › 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
Article number	4253128
Pages (from-to)	2275-2278
Number of pages	4
Journal	Proceedings - IEEE International Symposium on Circuits and Systems
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

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10.1109/iscas.2007.378841

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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",

pages = "2275--2278",

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

issn = "0271-4310",

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

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

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TY - JOUR

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 article

SN - 0271-4310

SP - 2275

EP - 2278

JO - Proceedings - IEEE International Symposium on Circuits and Systems

JF - Proceedings - IEEE International Symposium on Circuits and Systems

M1 - 4253128

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

Abstract

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