CMOS OTA for Detector Readout Electronics Integrator in the ALICE FIT Project

J. Miszczyński, P. Otfinowski, A. Laczewski, M. Grzegorzek, I. Brzozowski, C. Worek, P. Wiącek, P. Russek, J. Kitowski (AGH Univ. of Krakow, Poland), J. Otwinowski (Inst. of Nuclear Physics, Poland)

This article discusses a part of the integrator system, focusing on the Operational Transconductance Amplifier (OTA), a component of the read-out system for the FIT ALICE detector. The circuit is implemented using 180-nm CMOS technology within Cadence Virtuoso, powered by a 3.3 V supply. This design features a two-stage, single-edge CMOS operational transconductance amplifier (OTA) incorporating cascodes, along with a load capacitance of 50 pF. This solution allows for the processing of nanosecond pulses across a broad dynamic range.