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Enhanced phase noise modeling of fractional-N frequency synthesizers
- Himanshu Arora, N. Klemmer, J. Morizio, P. Wolf
- PhysicsIEEE Transactions on Circuits and Systems I…
- 14 February 2005
The model takes into account the reduction in CP thermal and flicker noise due to the changing duty cycle of Frac-N CP and is useful in characterizing the noise performance of Frack-N at the system-level, simplifying the design of fractional-N synthesizers and transmitters.
Evaluation of spike-detection algorithms fora brain-machine interface application
This work examined three classes of spike-detection algorithms to determine which is best suited for a wireless BMI with a limited transmission bandwidth and computational capabilities and indicated that the cost-function scores for the absolute value operator were comparable to those for more elaborate nonlinear energy operator based detectors.
Integrated circuit amplifiers for multi-electrode intracortical recording
This paper presents a comprehensive survey of the neural amplifiers described in publications prior to 2008, and methods to achieve high input impedance, low noise and a large time-constant high-pass filter are reviewed.
Intracardiac echocardiography measurement of dynamic myocardial stiffness with shear wave velocimetry.
Excitation properties of the right cervical vagus nerve in adult dogs
Stimulus-induced critical point. Mechanism for electrical initiation of reentry in normal canine myocardium.
- D. Frazier, P. Wolf, J. Wharton, A. Tang, W. M. Smith, R. Ideker
- PhysicsThe Journal of clinical investigation
- 1 March 1989
The hypothesis was tested that the field of a premature (S2) stimulus, interacting with relatively refractory tissue, can create unidirectional block and reentry in the absence of nonuniform dispersion of recovery when S2 field strengths and tissue refractoriness are uniformally dispersed at an angle to each other.
A multichannel telemetry system for single unit neural recordings
Transmural activations and stimulus potentials in three-dimensional anisotropic canine myocardium.
In six open-chest dogs, simultaneous recordings were made from 120 transmural electrodes in 40 plunge electrodes within a 35 X 20 X 5-mm portion of the right ventricular outflow tract during epicardial and endocardial pacing, and it is concluded that the initial spread of activation is helicoid and determined by transmural fiber direction.
In Vivo Cardiac, Acoustic-Radiation-Force-Driven, Shear Wave Velocimetry
Variations in velocity estimates suggest a spatial dependence of shear wave velocity through the mid-myocardium of the LVFW, with velocity estimates changing, in limited cases, through depth and lateral position.
Mechanism of Ventricular Vulnerability to Single Premature Stimuli in Open‐Chest Dogs
To determine the mechanism of ventricular vulnerability to electrical stimulation, we simultaneously recorded from 120 transmural electrodes hi a 35 ± 20 ± 5-mm portion of right ventricular…