Sensors 2008, 8(1), 35-50; doi:10.3390/s8010035
Article

Input-output Transfer Function Analysis of a Photometer Circuit Based on an Operational Amplifier

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Received: 22 December 2007; Accepted: 7 January 2008 / Published: 9 January 2008
(This article belongs to the Special Issue Intelligent Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: In this paper an input-output transfer function analysis based on the frequencyresponse of a photometer circuit based on operational amplifier (op amp) is carried out. Opamps are universally used in monitoring photodetectors and there are a variety of amplifierconnections for this purpose. However, the electronic circuits that are usually used to carryout the signal treatment in photometer circuits introduce some limitations in theperformance of the photometers that influence the selection of the op amps and otherelectronic devices. For example, the bandwidth, slew-rate, noise, input impedance and gain,among other characteristics of the op amp, are often the performance limiting factors ofphotometer circuits. For this reason, in this paper a comparative analysis between twophotodiode amplifier circuits is carried out. One circuit is based on a conventional currentto-voltage converter connection and the other circuit is based on a robust current-to-voltageconverter connection. The results are satisfactory and show that the photodiode amplifierperformance can be improved by using robust control techniques.
Keywords: photometer circuit; current-to-voltage converter connection; frequency response; robust control
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MDPI and ACS Style

Hernandez, W. Input-output Transfer Function Analysis of a Photometer Circuit Based on an Operational Amplifier. Sensors 2008, 8, 35-50.

AMA Style

Hernandez W. Input-output Transfer Function Analysis of a Photometer Circuit Based on an Operational Amplifier. Sensors. 2008; 8(1):35-50.

Chicago/Turabian Style

Hernandez, Wilmar. 2008. "Input-output Transfer Function Analysis of a Photometer Circuit Based on an Operational Amplifier." Sensors 8, no. 1: 35-50.

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