arXiv subjects

Dong-xu Yang

Publications and source records attributed to Dong-xu Yang.

3 recordsLinked to original sources

arXiv2018

A Driver ASIC for Scientific CCD Detectors Using 180nm Technology

In order to achieve the driver function for several types of scientific CCD detector from E2V Co Ltd, and decreasing the size of electronics of CCD detector system, an Application-specified Integrated Circuit (ASIC) was designed. It provides multi-channel clocks and bias voltage for CCD driver. In the ASIC, the clock drivers are made of a clock switch circuit and high voltage amplifier. Two 8-bit current-steering DACs are used to adjust the driver capability and high-level voltage of clocks. The bias drivers are generated by 8-bit current-steering DACs and off-chip operation amplifiers. The Global Foundry 180 nm BCDlite technology is selected to implement this design. The first version of design has been finished and the tests have been done.

physics.ins-det↗

arXiv2018

Design of a Non-vacuum-cooling Compact Scientific CCD Camera

CCD was born in Bell Laboratories in 1969 and has been widely used in various fields. Its ultra-low noise and high quantum efficiency make it work well in particle physics, high energy physics, nuclear physics and astrophysics. Nowadays, more and more CCD cameras have been developed for medical diagnosis, scientific experiments, aerospace, military exploration and other fields. For the wide range of CCD cameras, a Non-vacuum-cooling compact (NVCC) scientific CCD camera has been developed, including FPGA-based low noise clock and bias driver circuit, data acquisition circuit, STM32-based temperature control design. At the same time, the readout noise of the imaging system is studied emphatically. The scheme to generate the CCD clock and the bias driving circuit through ultralow noise LDOs is proposed. The camera was tested in a variety of environments, and the test results show that the system can run at a maximum rate of 5M pixels/s and readout noise is as low as 9.29e^- when the CCD readout speed is 500K pixels/s. Finally, a series of stability tests were carried out on the camera system.

physics.ins-det↗

arXiv2015

A bias-free quantum random number generation using photon arrival time selectively

We present a high-quality, bias-free quantum random number generator (QRNG) using photon arrival time selectively in accordance with the number of photon detection events within a sampling time interval in attenuated light. It is well showed in both theoretical analysis and experiments verification that this random number production method eliminates both bias and correlation perfectly without more post processing and the random number can clearly pass the standard randomness tests. We fulfill theoretical analysis and experimental verification of the method whose rate can reach up to 45Mbps.

quant-ph↗