A Low Noise, Wide Bandwidth Preamplifier for Fast Time Measurement Using Diamond Detectors

Particles arriving at the detector will generate fast narrow pulse signals, and the arrival time of particles can be obtained through different timing methods, but these small pulse signals need to be preprocessed first, so a high-gain, wide bandwidth, low noise front-end amplifier has been designed and realized to match the 50 Ω output impedance of the diamond detector in the TOF (Time of Flight) wall of RIBLL2 experiment of the High Intensity Heavy Ion Accelerator Facility (HIAF), China. Realized in TSMC 0.18 μm process, the front-end amplifier finally shows the gain of 240 (47.5dB), bandwidth of 2.6M-503MHz which allows a very short signal peaking time of no more than 1 ns, equivalent input noise less than 5 mV
rms
, power consumption less than 15mW.