High-speed high-precision CMOS analog rank order filter with O(n) complexity

A new architecture to realize a modular, high-speed, reconfigurable, digital Rank Order Filter (ROF) is presented in this paper. A bit-level algorithm by Kar and Pradhan has been modified in this work to implement the proposed ROF. Using the proposed digital rank selection circuit it is possible to find the element of a certain rank in a given sequence of N elements in each window in M steps, where M is the number of bits used in binary representation for the elements of the sequence. The size of the proposed ROF increases only linearly with the number of samples in each window to be ranked. The proposed ROF is also modular in nature, which means function of each part of the ROF is well defined and so the circuit can be easily expandable for larger window size. The proposed ROF has been implemented in FPGA and post-fit simulation results are presented in this paper. HSPICE simulation of the proposed ROF is also done for 0.18um CMOS process. The simulation result shows that the circuit could be operated at a clock speed of 500 MHz.

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Dynamic Control Models of a Robot for High Speed and High Precision Assembly with Tolerance Constraints

10.23919/acc.1984.4788496 ◽

1984 ◽

Author(s):

Sherman S. Wang ◽

Arun Sharma

Keyword(s):

High Precision ◽

High Speed ◽

Dynamic Control ◽

Control Models

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A differential reference voltage source used in high-speed high-precision pipelined ADC

JOURNAL OF ELECTRONIC MEASUREMENT AND INSTRUMENT ◽

10.3724/sp.j.1187.2012.01043 ◽

2013 ◽

Vol 26 (12) ◽

pp. 1043-1049

Author(s):

Yongsheng Yin ◽

Xinbo Yang ◽

Honghui Deng

Keyword(s):

High Precision ◽

High Speed ◽

Reference Voltage ◽

Voltage Source ◽

Pipelined Adc ◽

Reference Voltage Source

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Variable step control to improve scanning speed of gene sequencing stage

Measurement and Control ◽

10.1177/00202940211002219 ◽

2021 ◽

pp. 002029402110022

Author(s):

Xiaohua Zhou ◽

Jianbin Zheng ◽

Xiaoming Wang ◽

Wenda Niu ◽

Tongjian Guo

Keyword(s):

Motion Control ◽

High Precision ◽

High Speed ◽

Stable State ◽

Gene Sequencing ◽

Scanning Speed ◽

Settling Time ◽

Step Motion ◽

Variable Step ◽

Step Control

High-speed scanning is a huge challenge to the motion control of step-scanning gene sequencing stage. The stage should achieve high-precision position stability with minimal settling time for each step. The existing step-scanning scheme usually bases on fixed-step motion control, which has limited means to reduce the time cost of approaching the desired position and keeping high-precision position stability. In this work, we focus on shortening the settling time of stepping motion and propose a novel variable step control method to increase the scanning speed of gene sequencing stage. Specifically, the variable step control stabilizes the stage at any position in a steady-state interval rather than the desired position on each step, so that reduces the settling time. The resulting step-length error is compensated in the next acceleration and deceleration process of stepping to avoid the accumulation of errors. We explicitly described the working process of the step-scanning gene sequencer and designed the PID control structure used in the variable step control for the gene sequencing stage. The simulation was performed to check the performance and stability of the variable step control. Under the conditions of the variable step control where the IMA6000 gene sequencer prototype was evaluated extensively. The experimental results show that the real gene sequencer can step 1.54 mm in 50 ms period, and maintain a high-precision stable state less than 30 nm standard deviation in the following 10 ms period. The proposed method performs well on the gene sequencing stage.

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