Results 221 to 230 of about 591,277 (274)

A twice curvature compensated voltage reference with double frequency compensation

Microelectronics Journal, 2020
Abstract This paper presents a voltage reference (VR) with low temperature coefficient (TC) and full frequency high power supply rejection ratio (PSRR), the VR is fabricated by 0.18 μm CMOS process. The proposed VR uses different methods to compensate for the temperature curvature of the output voltage twice.
Xifeng Liu
exaly   +3 more sources

Curvature sensing and compensation: a new concept in adaptive optics

Applied Optics, 1988
Mesure et compensation, en temps reel, de fronts d'onde soumis a une perturbation atmospherique.
F Roddier
exaly   +3 more sources

Dynamic Compensation Technique for POF Curvature Sensors

Journal of Lightwave Technology, 2018
Polymer optical fibers (POF) can be applied as curvature sensors due to its high strain limits, fracture toughness, and flexibility in bend. However, POFs present viscoelastic behavior, which leads to a phase lag between the stress and strain. The polymer viscoelasticity can be associated to the high hysteresis and the errors that curvature sensors ...
Anselmo Frizera Neto, Maria Pontes, Arnaldo Leal Junior   +2 more
exaly   +2 more sources

A curvature-compensated bandgap reference with high PSR

2008 IEEE International Conference on Granular Computing, 2008
In this paper, a curvature-compensated current mode bandgap reference with high supply rejection(PSR) is presented, which is in a 0.5 um 2P2M n-well mixed signal CMOS technology. Several resistors are added to improve temperature coefficient(TC). Otherwise the supply noise is directly fed into the feedback loop of the bandgap circuit by utilizing a ...
Jian Yu, Yuanfu Zhao, Zongmin Wang, Tieliang Zhang   +3 more
  +7 more sources

Compensators of Petzval field curvature and astigmatism

Journal of Optical Technology, 2021
Optical schemes of aplanatic and afocal compensators of field curvature and astigmatism are considered. A method of their design is proposed and application guidelines are presented. An example of designing a double-lens objective with an extended field and one compensator is presented.
L. N. Andreev, V. V. Ezhova, E. A. Tsyganok, A. D. Kozhina   +3 more
openaire   +1 more source

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