Response-Time Acceleration of a Frontend Amplifier for High Output Impedance Sensors

Kamel MARS; Shoji KAWAHITO

doi:10.1587/transele.E95.C.1543

Response-Time Acceleration of a Frontend Amplifier for High Output Impedance Sensors

Kamel MARS, Shoji KAWAHITO

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This paper presents a response time acceleration technique in a high-gain capacitive-feedback frontend amplifier (FA) for high output impedance sensors. Using an auxiliary amplifier as a unity-gain buffer, a sample-and-hold capacitor which is used for band-limiting and sampling the FA output is driven at the beginning of the transient response to make the response faster and then it is re-charged directly by the FA output. A condition and parameters for the response time acceleration using this technique while maintaining the noise level unaffected are discussed. Theoretical analysis and simulation results show that the response time can be less than half of the case without the acceleration technique for the specified settling error of less than 0.5%.

Publication: IEICE TRANSACTIONS on Electronics Vol.E95-C No.9 pp.1543-1548

Publication Date: 2012/09/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E95.C.1543

Type of Manuscript: PAPER

Category: Electronic Circuits

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Kamel MARS, Shoji KAWAHITO, "Response-Time Acceleration of a Frontend Amplifier for High Output Impedance Sensors" in IEICE TRANSACTIONS on Electronics, vol. E95-C, no. 9, pp. 1543-1548, September 2012, doi: 10.1587/transele.E95.C.1543.
Abstract: This paper presents a response time acceleration technique in a high-gain capacitive-feedback frontend amplifier (FA) for high output impedance sensors. Using an auxiliary amplifier as a unity-gain buffer, a sample-and-hold capacitor which is used for band-limiting and sampling the FA output is driven at the beginning of the transient response to make the response faster and then it is re-charged directly by the FA output. A condition and parameters for the response time acceleration using this technique while maintaining the noise level unaffected are discussed. Theoretical analysis and simulation results show that the response time can be less than half of the case without the acceleration technique for the specified settling error of less than 0.5%.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.E95.C.1543/_p

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@ARTICLE{e95-c_9_1543,
author={Kamel MARS, Shoji KAWAHITO, },
journal={IEICE TRANSACTIONS on Electronics},
title={Response-Time Acceleration of a Frontend Amplifier for High Output Impedance Sensors},
year={2012},
volume={E95-C},
number={9},
pages={1543-1548},
abstract={This paper presents a response time acceleration technique in a high-gain capacitive-feedback frontend amplifier (FA) for high output impedance sensors. Using an auxiliary amplifier as a unity-gain buffer, a sample-and-hold capacitor which is used for band-limiting and sampling the FA output is driven at the beginning of the transient response to make the response faster and then it is re-charged directly by the FA output. A condition and parameters for the response time acceleration using this technique while maintaining the noise level unaffected are discussed. Theoretical analysis and simulation results show that the response time can be less than half of the case without the acceleration technique for the specified settling error of less than 0.5%.},
keywords={},
doi={10.1587/transele.E95.C.1543},
ISSN={1745-1353},
month={September},}

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TY - JOUR
TI - Response-Time Acceleration of a Frontend Amplifier for High Output Impedance Sensors
T2 - IEICE TRANSACTIONS on Electronics
SP - 1543
EP - 1548
AU - Kamel MARS
AU - Shoji KAWAHITO
PY - 2012
DO - 10.1587/transele.E95.C.1543
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E95-C
IS - 9
JA - IEICE TRANSACTIONS on Electronics
Y1 - September 2012
AB - This paper presents a response time acceleration technique in a high-gain capacitive-feedback frontend amplifier (FA) for high output impedance sensors. Using an auxiliary amplifier as a unity-gain buffer, a sample-and-hold capacitor which is used for band-limiting and sampling the FA output is driven at the beginning of the transient response to make the response faster and then it is re-charged directly by the FA output. A condition and parameters for the response time acceleration using this technique while maintaining the noise level unaffected are discussed. Theoretical analysis and simulation results show that the response time can be less than half of the case without the acceleration technique for the specified settling error of less than 0.5%.
ER -