A very low offset voltage operational amplifier using field programmable floating-gate technology

Iglesias-Rojas, Juan Carlos; Gómez-Castañeda, F.; Moreno-Cadenas, J.A.

doi:10.1109/conielecomp.2010.5440804

Cited by 1 publication

(1 citation statement)

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“…To be compliant with the offset voltage requirements, a Programmable Offset Operational Amplifier (POOA) was used [ 11 , 12 ]. The POOA is the heart of the proposed flame detection sensor due to its capability of setting its offset voltage by means of programming.…”

Section: Introductionmentioning

confidence: 99%

An LMS Programming Scheme and Floating-Gate Technology Enabled Trimmer-Less and Low Voltage Flame Detection Sensor

Iglesias-Rojas

Gómez-Castañeda

Moreno-Cadenas

2017

Sensors

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In this paper, a Least Mean Square (LMS) programming scheme is used to set the offset voltage of two operational amplifiers that were built using floating-gate transistors, enabling a 0.95 VRMS trimmer-less flame detection sensor. The programming scheme is capable of setting the offset voltage over a wide range of values by means of electron injection. The flame detection sensor consists of two programmable offset operational amplifiers; the first amplifier serves as a 26 μV offset voltage follower, whereas the second amplifier acts as a programmable trimmer-less voltage comparator. Both amplifiers form the proposed sensor, whose principle of functionality is based on the detection of the electrical changes produced by the flame ionization. The experimental results show that it is possible to measure the presence of a flame accurately after programming the amplifiers with a maximum of 35 LMS-algorithm iterations. Current commercial flame detectors are mainly used in absorption refrigerators and large industrial gas heaters, where a high voltage AC source and several mechanical trimmings are used in order to accurately measure the presence of the flame.

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Section: Introductionmentioning

confidence: 99%