A monolithic active pixel detector and method thereof

Abstract

The present invention relates to a single-chip active pixel detector and its method, which includes a pixel circuit, and a column readout circuit is located between two column pixel circuits; the digitized energy amplitude information and the hit signal output by the column readout circuit are transmitted to In the column ADC, the particle concentrated position information and hit signal output by the column readout circuit are transmitted to the top layer readout circuit; the row and column selection signal and the Strobe signal output by the pixel configuration and readout control circuit are transmitted to the pixel circuit, and the generated chip The data flag bit, the Readout Start signal is transmitted to the top-level readout circuit; the column ADC and its bias circuit are used to detect the particle energy amplitude; the top-level readout circuit receives the particle hit position information output by the column readout circuit, and the output of the column ADC. The energy amplitude information and the data flag corresponding to the same data frame complete the data frame packaging, and output to the outside of MAPS through the serial data link, so as to realize the simultaneous detection of particle hitting position and energy amplitude. The invention has the advantages of high resolution, high charge collection efficiency, high filling factor, high sensitivity, low power consumption and the like.

Description

technical field [0001] The invention relates to the design field of semiconductor integrated circuits, in particular to a single-chip active pixel detector with track detection and energy amplitude ΔE detection capabilities and a method thereof. Background technique [0002] At present, there are a large number of different types of particles with different energy amplitudes in applications such as high-energy physics experiments, space particle detection, and intelligent digital medical care. If you want to accurately measure the energy spectrum of these particles, identify element types, and explore their flux The characteristics and their changes, and the study of major fundamental physical issues such as the origin of cosmic elements require a monolithic active pixel detector (Monolitich Active Pixel Sensor, MAPS) chip with both track detection and energy amplitude ΔE detection capabilities. At present, for such applications in the world, the high-speed ADC (Analog to Di...

AI Technical Summary

Problems solved by technology

However, due to the large number of pixels in MAPS, a single chip contains about 130,000 pixels, even with 8 analog outputs, the maximum readout can only reach the order of 1kHz, which limits the amplitude readout rate of the system. At the same time, using off-chip ADC for digitization will reduce the integration level of the system and increase the system noise

Images