Radiation Sensor Based on MOSFETs Mismatch Amplification for Radiotherapy Applications

Abstract

In this paper we present a new dosimeter based on apair of thick gate oxide MOSFET sensors. A differential circuittopology with a feedback loop provides stabilized output withselectable sensitivity amplification for real-time in vivo dosimetry.Radiation response shows a wide linear output range and aneffective thermal rejection. These properties make this circuitsuitable for dose control in radiotherapy applications.