Results 261 to 270 of about 5,116,497 (296)

Poly-phase sigma-delta modulation

IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 1997
A new circuit is described for the implementation of analog sigma-delta modulation. It is based upon the use of a poly-phase sampler with the aim of obtaining high over-sampling ratios at low clock frequencies. A detailed analysis of second-order systems is made to predict its performance.
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A delta-sigma modulator with a phase-to-digital and digital-to-phase quantizer

2011 IEEE 9th International New Circuits and systems conference, 2011
A phase-based delta-sigma analog-to-digital converter (ADC) architecture with a combination voltage-controlled and digitally-controlled delay lines (VCDL-DCDL) is presented. The architecture uses this VCDL-DCDL combination as the phase-domain counterparts of an ADC-DAC in a traditional delta-sigma modulator.
Yiqiao Lin, Mohammed Ismail
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Phase Stability of the Sigma Phase in Fe-Cr Based Alloys

MRS Proceedings, 1995
AbstractThe FeCr sigma phase is a good example of a complex structure: it. has 30 atoms in the unit cell and 5 inequivalent lattice sites, and it belongs to the class of tetrahedrally close packed structures, also known as Frank-Kaspar structures. So far.
Marcel Il. F, Sluiter. Koivan Esfurjani, Yoshiyuki Kawazoe   +2 more
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Linear Sigma Model and Phase Transitions

2013
In Chap. 3 we have commented about the experimental minimum of \(\eta /s\) observed at the phase transition for some fluids. We have supported this fact by explicitly calculating this coefficient for the atomic Argon.
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Sigma phase in 321 stainless steel

Materialwissenschaft und Werkstofftechnik, 1973
AbstractThe failure of a 321 stainless steel flange due to the presence of sigma phase was used to check etching procedures for sigma phase in 321 SS as well as to establish the time‐temperature diagram for sigma phase in this material.
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Phase Transformations in Sigma Phases by Mechanical Milling

Materials Science Forum, 1994
Yang, H., Bakker, H.
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Crystallography of the sigma phase

JOM, 1950
Paul Pietrokowsky, Pol Duwez
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The effect of irradiation on the phase stability of the sigma phase

Calphad, 1977
L. Kaufman, J.S. Watkin, J.H. Gittus, A.P. Miodownik   +3 more
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The sigma phase in binary alloys

JOM, 1954
Peter Greenfield, Paul A. Beck
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Twin boundary-assisted precipitation of sigma phase in a high-entropy alloy

Materials Letters, 2021
Jianjun Li, Junhua Hou, Wenjun Lu
exaly