Results 251 to 260 of about 1,069,051 (295)

Spin Transfer Induced Noise in CPP Read Heads

IEEE Transactions on Magnetics, 2004
In this paper, spin transfer induced magnetic noise in current-perpendicular-to-plane (CPP) spin valve heads is investigated via micromagnetic modeling with spin transfer torque included. It is found that there exists of a critical sense current density beyond which the spin transfer effect yields a substantial noise with a pronounced (1/f/sup n ...
J.-G. Zhu, X. Zhu
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Noise of optical character reading machines

The Journal of the Acoustical Society of America, 1977
The manufacturer of a machine for optical character reading requested assistance in solving the noise problems resulting from a new design. The noise of the new machine was at such a level as to bar its acceptance by potential clients. Initial sound level readings, tape recordings and real time analysis resulted in identifying problems with noisy gears,
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The Effect of Noise on Lip-Reading Performance

British Journal of Audiology, 1972
Normal hearing young adults received a lip-reading test in quiet (55dB SPL), and in continuous and in intermittent white noise backgrounds of 90dB SPL. Scores decreased from the quiet to the continuous noise to the intermittent noise background, but differences were not statistically significant.
Kenneth W. Berger, Michael A. Lewis
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Light coupled read-out system for noise dosimeter

The Journal of the Acoustical Society of America, 1979
A read-out system for a portable noise dosimeter uses light coupled signals to obtain a noise level read-out display. The light signals are coded to effectively prevent extraneous light signals from causing read-out.
Gordon R. Sima, John L. Taylor
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A Portable, Direct-Reading Microwave Noise Generator

Proceedings of the IRE, 1952
This paper discusses the factors which influenced the design of a directly calibrated portable microwave noise source, utilizing a fluorescent lamp. The variation of the noise power output and the impedance match as a function of the operating temperature are considered, and the portable unit is described.
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Temporal uncertainty in reading the neural code (proportional noise)

Biosystems, 2002
It is widely accepted that neural information is encoded in the timing of action potentials. However, such information can only be transmitted if the receiver (soma, muscle fibre) can measure time precisely. We argue that such timing is inevitably imprecise due to biological fluctuations in receiver function.
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Pulsed-to-Continuous Read Signal Converter for Increasing Read Signal-to-Noise Ratio

Japanese Journal of Applied Physics, 2008
The signal-to-noise ratio (SNR) of the read signal from an optical disc was improved by using a new signal conversion technology. Using this technology, a pulsed read signal was converted into a continuous signal without signal amplitude loss, which was unavoidable using conventional method.
Atsushi Kikukawa, Hiroyuki Minemura
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Analysis of large-signal noise in read oscillators

Solid-State Electronics, 1972
Abstract A large-signal noise theory to second order in the r.f. amplitude is developed for the noise generator of an IMPATT oscillator of Read-type. The coefficient for the second order term in the noise spectrum is calculated as function of frequency.
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Effect of transition noise on the signal-to-noise ratio of magnetooptic read channels

IEEE Transactions on Magnetics, 1996
The effect of transition noise on the soft bit error rate (BER) and the signal-to-noise ratio (SNR) in magnetooptic (MO) recording systems is studied. With high-density MO recording, transition noise and intersymbol interference (ISI) become problems.
I. Ozgunes, B.V.K.V. Kumar, M.H. Kryder
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A nonlinear theory of noise in read diodes

Proceedings of the IEEE, 1971
A nonlinear theory of noise in a Read diode which takes account of the coupling between low and high frequencies has been developed. At high levels, the components of the driving noise voltage of the diode, in phase and out of phase with the signal, have unequal values and are correlated.
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