Read-out analog channel with interpolator for signal peak finding. (December 2020)

• Record Type: Journal Article
• Authors: Shumikhin, V; Atkin, E; Azarov, D; Normanov, D; Ivanov, P; Serazetdinov, A
• Is Part Of: Journal of physics. Volume 1690(2020)
• Publication Date: 2020-12
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1690/1/012068
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: A prototype of an analog channel with a digital processing system for reading signals from GEM detectors is presented. Each channel consists of a charge-sensitive amplifier, a shaper, a switch, an amplifier and a 10-bits ADC. The data from the ADC is processed by the digital system based on an interpolator to find signal peaks. The interpolator uses a 6th order Lagrange polynomial. It maintains peak detection accuracy within 1.1 LSB at 25 MHz ADC sampling rate and 270 ns shaper peaking time.