It is shown that an MOS weak-inversion differential pair can be linearized considerably by replacing the tail current source with a MOSFET biased in the weak-inversion triode region. Calculations show that the transconductance can be kept constant to within +5%/ 0% for input voltages up to 130 mV. This linearized differential pair is used in a third-order transconductance-C bandpass filter with...

The kinetic attributes of the afferent arteriole myogenic response were investigated using the in vitro perfused hydronephrotic rat kidney. Equations describing the time course for pressure-dependent vasoconstriction and vasodilation, and steady-state changes in diameter were combined to develop a mathematical model of autoregulation. Transfer functions were constructed by passing sinusoidal pr...

Title of Document: THE NEURAL DYNAMICS OF AMPLITUDE MODULATION PROCESSING IN THE HUMAN AUDITORY SYSTEM Kai Sum Li, MS, 2010 Directed By: Professor Jonathan Z. Simon, Department of Electrical and Computer Engineering The neural, auditory amplitude modulation transfer function (MTF) is estimated from 3 – 50 Hz using magnetoencephalography (MEG). All acoustic stimuli are amplitude modulated (AM). ...

SUMMARY During earthquakes, structural damage is often related to soil conditions. Following the 2014 April 1 Mw 8.1 Iquique earthquake in Northern Chile, infrastructure was reported cities of and Alto Hospicio. In this study, we investigate causes site amplification region by numerically analysing effects topography basins on observed waveforms frequency range 0.1–3.5 Hz using spectral element...

Hydrides represent the first steps of interstellar chemistry. Sulfanylium (SH(+)), in particular, is a key tracer of energetic processes. We used ALMA and the IRAM 30 m telescope to search for the lowest frequency rotational lines of SH(+) toward the Orion Bar, the prototypical photo-dissociation region illuminated by a strong UV radiation field. On the basis of previous Herschel/HIFI observati...

1. The temporal contrast sensitivity of koniocellular, parvocellular and magnocellular cells in the lateral geniculate nucleus (LGN) of nine adult marmosets was measured. The receptive fields of the cells were between 0.3 and 70 deg from the fovea. The stimulus was a large spatially uniform field which was modulated in luminance at temporal frequencies between 0.98 and 64 Hz. 2. For each cell g...

Previous studies (e.g., Satoh et al., 1995a) on inversion of quality factor for S waves, QS, of sediments using surface-to-borehole spectral ratios of seismograms, are mostly based on one-dimensional wave propagation of vertically incident SH waves. In this study a method is proposed for inverting frequency-dependent QS, S-wave velocity VS, P-wave velocity VP and incidence angle by considering ...