A New High Precision Low Offset Dynamic Comparator for High Resolution High Speed ADCs

2006 ◽  
Author(s):  
Vipul Katyal ◽  
Randall L. Geiger ◽  
Degang J. Chen
Keyword(s):  
High Resolution ◽  
High Precision ◽  
High Speed ◽  
Dynamic Comparator ◽  
Low Offset

Design of High Speed and Low Offset SR Latch Based Dynamic Comparator

2020 ◽  
Author(s):  
Kasi Bandla ◽  
A Hari Krishnan ◽  
Sourabh Sethi ◽  
Dipankar Pal
Keyword(s):  
High Speed ◽  
Dynamic Comparator ◽  
Low Offset

A high speed low power low offset dynamic comparator used in SHA-less pipelined ADC

2014 ◽  
Vol 35 (5) ◽  
pp. 055008 ◽  
Author(s):  
Shubin Liu ◽  
Zhangming Zhu ◽  
Yintang Yang ◽  
Lianxi Liu
Keyword(s):  
Low Power ◽  
High Speed ◽  
Pipelined Adc ◽  
Dynamic Comparator ◽  
Low Offset

scholarly journals Pixelwise Phase Unwrapping Based on Ordered Periods Phase Shift

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 377
Author(s):  
Satoshi Tabata ◽  
Michika Maruyama ◽  
Yoshihiro Watanabe ◽  
Masatoshi Ishikawa
Keyword(s):  
High Resolution ◽  
Phase Shift ◽  
Real Time ◽  
High Precision ◽  
High Speed ◽  
Moving Objects ◽  
Global Illumination ◽  
Accurate Method ◽  
Phase Unwrapping ◽  
Order Structure

The existing phase-shift methods are effective in achieving high-speed, high-precision, high-resolution, real-time shape measurement of moving objects; however, a phase-unwrapping method that can handle the motion of target objects in a real environment and is robust against global illumination as well is yet to be established. Accordingly, a robust and highly accurate method for determining the absolute phase, using a minimum of three steps, is proposed in this study. In this proposed method, an order structure that rearranges the projection pattern for each period of the sine wave is introduced, so that solving the phase unwrapping problem comes down to calculating the pattern order. Using simulation experiments, it has been confirmed that the proposed method can be used in high-speed, high-precision, high-resolution, three-dimensional shape measurements even in situations with high-speed moving objects and presence of global illumination. In this study, an experimental measurement system was configured with a high-speed camera and projector, and real-time measurements were performed with a processing time of 1.05 ms and a throughput of 500 fps.

scholarly journals A 10GHZ Low-Offset Dynamic Comparator for High-Speed and Lower-Power ADCS

2019 ◽  
Vol 12 (2) ◽  
pp. 156-165
Author(s):  
Bakoune Pierre Hypolite ◽  
Wembe Tafo Evariste ◽  
Moukengue Imano Adolphe
Keyword(s):  
High Speed ◽  
Dynamic Comparator ◽  
Lower Power ◽  
Low Offset

scholarly journals Optical Fiber Bundle-Based High-Speed and Precise Micro-Scanning for Image High-Resolution Reconstruction

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 127
Author(s):  
Jiali Jiang ◽  
Xin Zhou ◽  
Jiaying Liu ◽  
Likang Pan ◽  
Ziting Pan ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Fiber ◽  
High Precision ◽  
Fiber Bundle ◽  
Piezoelectric Ceramic ◽  
High Speed ◽  
Ccd Camera ◽  
Imaging Method ◽  
Reconstruction Algorithms ◽  
Optical Fiber Bundle

We propose an imaging method based on optical fiber bundle combined with micro-scanning technique for improving image quality without complex image reconstruction algorithms. In the proposed method, a piezoelectric-ceramic-chip is used as the micro-displacement driver of the optical fiber bundle, which has the advantages of small volume, fast response speed and high precision. The corresponding displacement of the optical fiber bundle can be generated by precise voltage controlling. An optical fiber bundle with core/cladding diameter 4/80 μm and hexagonal arrangement is used to scan the 1951 USAF target. The scanning step is 1 μm, which is equivalent to the diffraction limit resolution of the optical system. The corresponding information is recorded at high speed through photo-detectors and a high-resolution image is obtained by image stitching processing. The minimum distinguishable stripe width of the proposed imaging technique with piezoelectric-ceramic-chip driven micro-scanning is approximately 2.1 μm, which is 1 time higher than that of direct imaging with a CCD camera whose pixel size is close to the fiber core size. The experimental results indicate that the optical fiber bundle combined with piezoelectric-ceramic-chip driven micro-scanning is a high-speed and high-precision technique for high-resolution imaging.

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