Speaker
Description
The Low Energy X-ray Polarization Detector (LPD) is one of the three payloads of the Gamma-ray Burst (GRB) Polarization Detector Space Station Detection Facility.LPD payload contains technologies such as the silicon pixel detector chip, the GMCP and high-power power supply. Pixel chip needs to be characterized by high effective detection area, high spatial resolution and low power consumption, which poses new challenges to performance requirements of the readout module of the chip.
This paper designs a pixel chip Topmetal-L with a novel readout scheme,the readout mode of the chip adopts the Region of interest (ROI) readout,it realizes fast readout for pixel units with particle injection. The ROI readout module is embedded in an L-shaped pattern around the pixel array, and module quickly reads out effective pixels by confirming the start pixel, the cutoff pixel, and number of pixels jump during scanning.The electronic system collects and processes the output signals of the pixel units, determines the areas where there is particle injection, and feeds back to the module to quickly scan to that pixel area and read it out. The module can control the driving circuit of each pixel, reducing chip power consumption.
The simulation results show that ROI readout effectively improves the readout rate of the chip and can meet the readout requirements under the strongest GRB conditions. The module can achieve fast readout with only one channel, significantly reducing the electronic power consumption of the payload. The introduction of drive switch effectively reduces the power consumption of the chip.
| Minioral | Yes |
|---|---|
| IEEE Member | Yes |
| Are you a student? | Yes |
