公开(公告)号：US09163996B2

公开(公告)日：2015-10-20

申请号：US14298920

申请日：2014-06-08

Applicant: University of Electronic Science and Technology of China

Inventor： Jian Lv ,  Longcheng Que ,  Yun Zhou ,  Linhai Wei ,  Yadong Jiang

IPC: G01J5/00 ,  G01J5/10 ,  G01J5/22 ,  G01J5/20

CPC classification number: G01J5/10 ,  G01J5/20 ,  G01J5/22 ,  G01J2005/106 ,  H04N5/33 ,  H04N5/3651

Abstract: A readout circuit for an uncooled infrared focal plane array includes: a first biasing circuit for generating a detection output signal; a second biasing circuit for generating a first reference output signal; a first integration circuit; and an analog-to-digital circuit including: a ramp signal generating circuit for generating a ramp signal according to a second reference microbolometer of a third biasing circuit. In the readout circuit, subtracting and amplifying the detection output signal and the first reference output signal are provided by the integrator at an analog domain, while ratio counting is provided by an analog-to-digital converter during analog-to-digital conversion. Furthermore, a column level integrated readout channel utilizes only one reference microbolometer, and the chip level ramp signal generator also utilizes only one reference microbolometer. Therefore, a chip area is further saved, and noise sources are decreased.

公开(公告)号：US20150192472A1

公开(公告)日：2015-07-09

申请号：US14298920

申请日：2014-06-08

Applicant: University of Electronic Science and Technology of China

Inventor： Jian Lv ,  Longcheng Que ,  Yun Zhou ,  Linhai Wei ,  Yadong Jiang

IPC: G01J5/10

CPC classification number: G01J5/10 ,  G01J5/20 ,  G01J5/22 ,  G01J2005/106 ,  H04N5/33 ,  H04N5/3651

Abstract: A readout circuit for an uncooled infrared focal plane array includes: a first biasing circuit for generating a detection output signal; a second biasing circuit for generating a first reference output signal; a first integration circuit; and an analog-to-digital circuit including: a ramp signal generating circuit for generating a ramp signal according to a second reference microbolometer of a third biasing circuit. In the readout circuit, subtracting and amplifying the detection output signal and the first reference output signal are provided by the integrator at an analog domain, while ratio counting is provided by an analog-to-digital converter during analog-to-digital conversion. Furthermore, a column level integrated readout channel utilizes only one reference microbolometer, and the chip level ramp signal generator also utilizes only one reference microbolometer. Therefore, a chip area is further saved, and noise sources are decreased.

Abstract translation: 用于非制冷红外焦平面阵列的读出电路包括：用于产生检测输出信号的第一偏置电路; 用于产生第一参考输出信号的第二偏置电路; 第一个集成电路; 以及模数电路，包括：斜坡信号发生电路，用于根据第三偏置电路的第二参考微量热计生成斜坡信号。 在读出电路中，减法和放大检测输出信号和第一参考输出信号由积分器以模拟域提供，而在模数转换期间由模数转换器提供比率计数。 此外，列级综合读出通道仅使用一个参考微量热计，芯片级斜坡信号发生器也仅使用一个参考微量热计。 因此，进一步节省了芯片面积，降低了噪声源。