ADC sampling reduction by an efficient implementation of queue application to X-ray spectrometry imagers

作者：Rostaing J P^*; Sicard G; Dupret A; Peizerat A; Villard P

来源：Electronics Letters, 2016, 52(6): 428-429.

DOI：10.1049/el.2015.4306

• X-ray spectra
• X-ray imaging
• analogue-digital conversion
• ADC sampling reduction
• queue application
• X-ray spectrometry imagers
• high-speed digital X-ray imager
• analogue-to-digital converter
• photon flux parameters
• maximum photon flux mean
• electronic circuit

In a high-speed digital X-ray imager, each pixel in the matrix needs an analogue-to-digital converter (ADC) in order to assess the energy of the randomly incoming photons. The analogue-to-digital (AD) conversion rate is thus highly dependent on the photon flux parameters, i.e. its mean and its standard deviation. In classic designs, this rate is often set to ten times the maximum photon flux mean, which requires high-speed ADCs. The use of a queue to derandomise the photon flux prior to the AD conversion and so allow the ADC sampling frequency to be decreased to the maximum photon flux mean value instead of ten times that value is proposed. An electronic circuit has been designed and the simulations results show a behaviour close to the theoretical model: at the cost of an additional queue block, reduced speed can be achieved, leading to a lower consumption and an easier integration.

• 出版日期2016-3-17
• 单位中国地震局