A 16‐bit Hybrid ADC with Circular‐Adder‐Based Counting for 15μm Pitch 640×512 LWIR FPAs

Autor:	Lu Wengao, Yuze Niu, Chen Zhongjian, Yajun Zhu, Zhaofeng Huang, Shengdong Zhang
Rok vydání:	2020
Předmět:	Dynamic random-access memory Adder Pixel Computer science Applied Mathematics Quantization (signal processing) Analog-to-digital converter law.invention 16-bit Readout integrated circuit CMOS law Hardware_INTEGRATEDCIRCUITS Electronic engineering Electrical and Electronic Engineering
Zdroj:	Chinese Journal of Electronics. 29:291-296
ISSN:	2075-5597 1022-4653
Popis:	A hybrid Analog to digital converter (ADC) is presented for long-wave infrared focal plane arrays. A two-stage quantization structure is applied in the folding integration process, which results in better chargehandling capacity and higher linearity compared with conventional designs while using fewer transistors at the pixel level. By employing a circular-adder-based counting structure with 3T dynamic memory cells, hardware consumption can be reduced. A pixel circuit of pitch 15μm has been designed using the 0.18mm Complementary metal-oxide-semiconductor (CMOS) process. The power consumption of the pixel-level ADC is 0.214μW, and the charge-handling capacity is 1Ge-. Simulation results demonstrate a signal-to-noise ratio of 90dB and a nonlinearity of 0.11%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ab3136eb089e6ede19764f48fc485669 https://doi.org/10.1049/cje.2020.01.006 Zobrazit plný text záznamu Plný text