Floating Gate CMOS Dosimeter With Frequency Output

Garcı́a-Moreno, E.; Isern, E.; Roca, M.; Picos, R.; Font, J.; Cesari, J.; Pineda, A.

doi:10.1109/tns.2012.2184301

Cited by 36 publications

(12 citation statements)

References 16 publications

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“…The radiation sensitive circuit is based on a single transistor whose gate is floating. The gate area is extended over the field oxide in order to increase the radiation sensitive volume (see [6,Fig. 1]).…”

Section: Conceptmentioning

confidence: 99%

“…As a consequence, a portion of the charge stored in the capacitor is neutralized by the radiation-generated electrons, inducing a variation in the drain current of the transistor [8]. The signal conditioning circuit converts this current variation into a 5-V square wave signal whose frequency is a function of the current variation, allowing the measurement of the absorbed dose [6], [9], [10]. This signal can be driven on loads such as PCB paths or 10-m coaxial cable.…”

Section: Conceptmentioning

confidence: 99%

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Investigation on Passive and Autonomous Mode Operation of Floating Gate Dosimeters

Brucoli

Cesari²,

Danzeca

et al. 2019

IEEE Trans. Nucl. Sci.

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In the context of achieving an efficient radiation monitoring system, while also aiming to increase the flexibility of the measurement system, the integrated digital and analog circuitries of the floating gate dosimeter (FGDOS) have been upgraded. The capability to control autonomously the recharge process and the easy access to the data allows exploiting the FGDOS in both the autonomous and passive mode. The former provides the cumulated dose measurement by a sensor coupled to a digital interface. The latter implies the reading of the dose only after the irradiation time, performing the dose detection by positioning the sensor without any supply. In this paper, the functionality and characterization of the new features of the FGDOS are demonstrated. The resolution, the dose range, and the error introduced on the measurements are discussed in detail by analyzing the results of irradiation experiments. The use of a filtering technique in different radiation environments is discussed, as well as the capability to retain the information after multiple readings and the power consumption for each configuration.

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Section: Conceptmentioning

confidence: 99%

Section: Conceptmentioning

confidence: 99%

Investigation on Passive and Autonomous Mode Operation of Floating Gate Dosimeters

Brucoli

Cesari²,

Danzeca

et al. 2019

IEEE Trans. Nucl. Sci.

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“…Different MOS based dosimeters have already been proposed in recent years [12], [14], [15], but without sensitivity amplification.…”

mentioning

confidence: 99%

CMOS Differential and Amplified Dosimeter with Field Oxide N-Channel MOSFETs

Carbonetto

GarcianInza

Lipovetzky

et al. 2014

IEEE Trans. Nucl. Sci.

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We propose the use of a CMOS differential circuit with inherent amplification to enhance the performance of n-channel field oxide MOSFETs as ionizing radiation dosimeters. These new dosimeters are aimed to be used in low dose applications such as X-ray diagnosis. The circuit is presented and described, and a discrete-level prototype was tested as regards sensitivity, temperature variations compensation and signal-to-noise ratio at different operation conditions. Results show that, comparing to a single MOSFET dosimeter, on chip amplification is possible along with temperature induced error attenuation. The highest sensitivity measured with respect to radiation was 0.4 V/rad. The circuit successfully measured the dose delivered in an X-ray image diagnosis environment with a sensitivity of approximately 0.5 V/rad.

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“…Nonetheless, using the same CMOS technology as in [11] a superior design of dosimeter circuitry based on FG MOSFET was thus reported. plication in radiation dosimetry [28][29][30]. The fundamental operation of these sensor design was the same as initially proposed by other researchers, however they used a different methodology for the detection of the radiation levels.…”

Section: Floating-gate Mosfet Dosimetersmentioning

confidence: 99%

“…The principles of ionizing radiation sensing by floating-gate MOS devices have been extensively explained by many publications, [11,12,16,29,31,79,80] to name a few.…”

Section: Principles Of Operation: Radiation Sensing and Programmingmentioning

confidence: 99%

Low Power Wireless CMOS System-On-Chip X-Ray Dosimeter

Yadegari¹

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Blood sterilization systems irradiate blood with Gamma or X-ray radiation to prevent transfusion-associated graft versus host diseases (TA-GvHD).Present day irradiators use tags applied to the blood bags which change color when exposed to radiation of 25 to 50 Gy. This method is neither accurate nor efficient and results in considerable blood wastage.This thesis investigates alternative solutions that are low power, easy to handle, compact and efficient. A floating-gate (FG) metal-oxide semiconductor field effect transistor (MOSFET) is studied for its application as a radiation sensor. FG MOSFETs have been employed for this application, but never using an RF-CMOS (0.13 µm) process suitable for RF-ID wireless readout. This work studies device optimization for best possible performance in radiation dosimetry. Devices are fabricated with This journey would not have been possible without the unconditional love and support I received from my lovely wife, Ariane, and my parents.

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Floating Gate CMOS Dosimeter With Frequency Output

Cited by 36 publications

References 16 publications

Investigation on Passive and Autonomous Mode Operation of Floating Gate Dosimeters

Investigation on Passive and Autonomous Mode Operation of Floating Gate Dosimeters

CMOS Differential and Amplified Dosimeter with Field Oxide N-Channel MOSFETs

Low Power Wireless CMOS System-On-Chip X-Ray Dosimeter

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