DIAMASIC: A multichannel front-end electronics for high-accuracy time measurements for diamond detectors

TL;DR

This paper presents a multichannel front-end electronics system designed in 130 nm CMOS technology for high-precision time measurements using diamond detectors, achieving 80ps timing jitter.

Contribution

It introduces a novel 8-channel preamplifier-discriminator circuit optimized for fast, accurate time-of-flight measurements with diamond detectors.

Findings

Timing jitter of about 80ps achieved

Low power consumption of 1.5mW per channel

Compact chip size of 1.27x1.22mm2

Abstract

This paper describes the design and testing results of an 8 channels preamplifier-discriminator circuit based on a resistive feedback Transimpedance Amplifier architecture and a Leading-Edge Discriminator stage for fast high-accuracy time measurement systems. The circuit has been designed in a 130 nm CMOS technology. It is intended to be used as a Front-End-Electronics for measuring the Time Of Flight using diamond detectors. The size of the chip is 1.27x1.22mm2 and the total power consumption of one channel is 1.5mW with a power supply of 1.2V. Testing results shows a timing jitter of about 80ps for a 10fC input charge pulse.