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This contribution presents a pragmatic approach to read-out electronics fordrift chambers used in particle physics experiments, specifically for the R3Bexperiment at GSI. The design uses discrete miniature SMD components and LVDSinputs of a low-cost FPGA to achieve a performance similar to classic ASICsolutions to the problem. The circuit comprises a high gain, low noiseamplifier, a custom signal shaper, tailored to the specifics of proportionalcounter signals, and a leading-edge discriminator with programmable threshold.The presented approach offers an attractive solution for small to medium sizeddetector systems that require specialized read-out electronics but cannotafford the high cost and development effort associated with ASICs.

A Custom Discrete Amplifier-Shaper-Discriminator Circuit for the Drift Chambers of the R3B Experiment at GSI