公开(公告)号：US10834806B2

公开(公告)日：2020-11-10

申请号：US15993987

申请日：2018-05-31

Applicant: Analog Devices, Inc.

Inventor： Gary R. Carreau

IPC: H05G1/38 ,  H05G1/10 ,  H04N5/32

Abstract: Systems and methods are provided for an automatic exposure detection feature for adding to an x-ray panel readout device, including an imaging panel having a low power mode, a sense circuit for receiving an input signal in the low power mode and restricting an input signal voltage to a first voltage, and a sensor for sensing a change in the input signal voltage, wherein the change in input signal voltage indicates exposure to an x-ray signal.

公开(公告)号：US09641189B2

公开(公告)日：2017-05-02

申请号：US14747071

申请日：2015-06-23

Applicant: ANALOG DEVICES, INC.

Inventor： Mark D. Maddox ,  Michael Coln ,  Gary R. Carreau ,  Baozhen Chen

IPC: H03M1/12 ,  H03M1/10 ,  H03M1/46

CPC classification number: H03M1/1071 ,  H03M1/1038 ,  H03M1/462 ,  H03M1/468

Abstract: When reservoir capacitors are moved on-chip for individual bit decisions, a successive approximation register analog-to-digital converter (SAR ADC) has an addition source of error which can significantly affect the performance of the SAR ADC. Calibration techniques can be applied to measure and correct for such error in an SAR ADC using decide-and-set switching. Specifically, a calibration technique can expose the effective bit weight of each bit under test using a plurality of special input voltages and storing a calibration word for each bit under test to correct for the error. Such a calibration technique can lessen the need to store a calibration word for each possible output word to correct the additional source of error. Furthermore, another calibration technique can expose the effective bit weight of each bit under test without having to generate the plurality of special input voltages.

公开(公告)号：US09584747B2

公开(公告)日：2017-02-28

申请号：US14012154

申请日：2013-08-28

Applicant: Analog Devices, Inc.

Inventor： Camille L. Huin ,  Gary R. Carreau

IPC: H04N5/378 ,  G01J1/44

CPC classification number: H04N5/378 ,  G01J1/44 ,  G01J2001/4406

Abstract: The system may include a pixel array, a selector, a sampler, and a converter. The pixel array may generate output signals representing radiation incident upon the pixel array. The selector may select one of the output signals. The sampler may sample the selected output signal. The converter may generate a digital signal based upon the selected output signal. The sampler may include a charge integrator that compensates for parasitic capacitance of the selector by selecting a first feedback capacitance to obtain a first sample, and after obtaining the first sample, selecting a second feedback capacitance to obtain a second sample. The first feedback capacitance may be greater than the second feedback capacitance.

Abstract translation: 该系统可以包括像素阵列，选择器，采样器和转换器。 像素阵列可以产生表示入射在像素阵列上的辐射的输出信号。 选择器可以选择输出信号之一。 采样器可以对选定的输出信号进行采样。 转换器可以基于所选择的输出信号产生数字信号。 采样器可以包括电荷积分器，其通过选择第一反馈电容来获得第一采样来补偿选择器的寄生电容，并且在获得第一采样之后，选择第二反馈电容以获得第二采样。 第一反馈电容可以大于第二反馈电容。