A High-Gain 1.75-GHz Dual-Inductor Transimpedance Amplifier With Gate Noise Suppression for Fast Radiation Detection

High-speed pulse-shape analysis can allow one to extract the physical parameters that govern radiation interaction. This brief presents a transimpedance preamplifier that can replace conventional configurations that contain a charge-sensitive preamplifier and shaping amplifier chain, particularly for high-speed radiation measurement systems. A transimpedance amplifier is a primary circuit of the preamplifier design based on a feedback structure with cascade inverting amplifiers and a feedback resistor, but it incorporates a bandwidth and gain enhancement technique that utilizes a series $LC$ circuit at the input of the amplifier. This configuration is designed to reduce the size, power consumption, and complexity of the front-end circuitry traditionally used in radiation measurements while enhancing pulse-shape analyses by preserving the temporal information of the carriers following radiation impingement. The preamplifier implemented in the 180-nm CMOS process exhibits an 83- $\mbox{dB}\Omega$ transimpedance gain and a 1.75-GHz bandwidth while consuming 48.6 mW using a 1.8-V supply.