Abstract
A particle detection chain based on CMOS-SOI VCO circuit is presented. The solution is used for the recognition and the tracking of a given particle at circuit level. TCAD simulation of the detector has been performed on a 3×3 matrix of diodes based detector for particles recognition and tracking. The current response of the detector has been used for a case study in order to determine the ability of the chain to recognize an alpha particle crossing a 3×3 detection cell. The detection limit of the proposed solution is investigated and discussed in this paper.
Highlights
SEMICONDUCTOR radiation detectors can be classified into several categories, depending on the application field and the particles to be detected
The VCO chain is composed of three parts: a CMOS based pixel detector, a shaping circuit based on a Voltage Controlled ring Oscillator (VCO) and a system for frequency and amplitude detection (Fig. 1)
The detection chain presented in this work is based on an innovative concept based on an indirect detection through a voltage controlled oscillator
Summary
SEMICONDUCTOR radiation detectors can be classified into several categories, depending on the application field and the particles to be detected. The knowledge of the generated current shape at the output of the detector allows easier post processing of the signal In this context, a new approach based on the use of a ring oscillator was developed with an innovative conditioning method. A new approach based on the use of a ring oscillator was developed with an innovative conditioning method This new approach is based on the reading of the information related to indirect output parameters of the detection chain signal (i.e. phase and frequency), instead of directly measuring the current from the sensor. This solution is interesting since it avoids most of the design problems described upper.
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