Results 211 to 220 of about 629,535 (260)

Compensation of curvature effects by illumination

Physics Letters A, 2007
Front deformation of initially planar excitation waves can be observed in nonplanar media or in spatially heterogeneously illuminated systems. The deformation of propagating reaction–diffusion waves in either of these systems has been investigated earlier separately.
On-Uma Kheowan, Vasily A. Davydov, Niklas Manz, Stefan C. Müller   +3 more
openaire   +1 more source

A CMOS piecewise curvature-compensated voltage reference

Microelectronics Journal, 2009
This paper presents a novel approach to the design of a high-precision CMOS voltage reference. The proposed circuit utilizes MOS transistors instead of bipolar transistors to generate positive and negative temperature coefficient (TC) currents summed up to a resistive load to generate low TC reference voltage.
Xinquan Lai, Ziyou Xu, Yanming Li, Qiang Ye, Maoli Man   +4 more
openaire   +1 more source

Exponential curvature-compensated BiCMOS bandgap references

IEEE Journal of Solid-State Circuits, 1994
An exponential curvature compensation technique for bandgap references (BGR's) which exploits the temperature characteristics of the current gain /spl beta/ of a bipolar transistor is described. This technique requires no additional circuits for the curvature compensation; only a size adjustment of a bias transistor in a conventional first-order ...
In-Yeol Lee, Gyudong Kim, Wonchan Kim
openaire   +2 more sources

Curvature compensated TIA based BGR

2017 4th International Conference on Signal Processing and Integrated Networks (SPIN), 2017
In this paper, a transimpedance amplifier based curvature compensated bandgap reference (BGR) is proposed. Detailed analysis of the proposed structure is presented. Functionality of proposed BGR is verified through SPICE simulations using 180nm CMOS technology.
Yash Nigam, Rajeshwari Pandey, Neeta Pandey   +2 more
openaire   +1 more source

Curvature Sensing And Compensation: A Computer Simulation

SPIE Proceedings, 1989
The concept of curvature sensing and compensation in adaptive optics is investigated by means of a computer simulation. Satisfactory correction is observed when the signal from a 13 element sensor is directly applied to a simulated membrane mirror.
Nicolas Roddier, Francois Roddier
openaire   +1 more source

A radiation-hard curvature compensated bandgap voltage reference

e & i Elektrotechnik und Informationstechnik, 2018
In this work a radiation-hardened bandgap voltage reference circuit is presented. The circuit is targeted at precision applications, where trimming can be used to achieve a temperature coefficient smaller than $5~\mbox{ppm}/\
Mario Auer, Varvara Bezhenova
openaire   +1 more source

A high-performance bandgap reference with advanced curvature-compensation

2011 9th IEEE International Conference on ASIC, 2011
A high-performance bandgap reference (BGR) with segmented compensation is proposed in this paper. In order to realize high-order curvature compensation, a voltage proportional to V be /s is used in lower temperature, and a voltage with more positive TC is added in higher temperature.
Ze-kun Zhou, Xiang-zhu Xu, Yue Shi 0001, Xin Ming, Bo Zhang 0027   +4 more
openaire   +1 more source

A curvature-compensated CMOS bandgap with negative feedback technique

Microelectronics Journal, 2016
This paper propose a novel high-order curvature-corrected CMOS bandgap reference (BGR) utilizing the negative feedback structure. The innovative negative feedback bandgap core not only compensates the exponential nonlinearity of VBE but also improves the power supply rejection ratio (PSRR) and line regulation.
Xiaochao Li, Liangxi Zhou, Yihui Chen, Ying Zhang, Chunhui Cao, Donghui Guo   +5 more
openaire   +1 more source

Curvature compensated CMOS bandgap with sub 1V supply

Third IEEE International Workshop on Electronic Design, Test and Applications (DELTA'06), 2006
We describe a bandgap circuit capable of generating a reference voltage of 0.730V. The circuit is implemented in 0.18/spl mu/m CMOS technology and operates with 0.9 V supply voltage, consuming 5/spl mu/A current. The circuit achieves 7ppm/spl rho/K of temperature coefficient with supply voltage range from 0.9 to 1.5V and temperature range from 0 to 60 ...
Kevin Tom, Atila Alvandpour
openaire   +1 more source

Stature and growth compensation for spinal curvature

2008
Spinal curvatures alter measured stature and may influence the evaluation of skeletal maturity and growth based on stature measurements. Methods: A dataset of calibrated measurements of vertebral positions of 407 radiographs in the frontal plane, together with clinically measured Cobb angles was used to determine the difference between spinal length ...
openaire   +2 more sources