Transmission characteristics of band-pass filter terminated in time-varying load

2010 ◽  
Author(s):  
Zhi Song
Keyword(s):  
Band Pass Filter ◽  
Time Varying ◽  
Transmission Characteristics ◽  
Pass Filter ◽  
Band Pass

scholarly journals Dendrite-to-Soma Input/Output Function of Continuous Time-Varying Signals in Hippocampal CA1 Pyramidal Neurons

2007 ◽  
Vol 98 (5) ◽  
pp. 2943-2955 ◽  
Author(s):  
Erik P. Cook ◽  
Jennifer A. Guest ◽  
Yong Liang ◽  
Nicolas Y. Masse ◽  
Costa M. Colbert
Keyword(s):  
Pyramidal Neurons ◽  
Gain Control ◽  
Linear Filter ◽  
Band Pass Filter ◽  
Time Varying ◽  
Input Output ◽  
Frequency Range ◽  
Pass Filter ◽  
Ca1 Pyramidal Neurons ◽  
Band Pass

We examined how hippocamal CA1 neurons process complex time-varying inputs that dendrites are likely to receive in vivo. We propose a functional model of the dendrite-to-soma input/output relationship that combines temporal integration and static-gain control mechanisms. Using simultaneous dual whole cell recordings, we injected 50 s of subthreshold and suprathreshold zero-mean white-noise current into the primary dendritic trunk along the proximal 2/3 of stratum radiatum and measured the membrane potential at the soma. Applying a nonlinear system-identification analysis, we found that a cascade of a linear filter followed by an adapting static-gain term fully accounted for the nonspiking input/output relationship between the dendrite and soma. The estimated filters contained a prominent band-pass region in the 1- to 10-Hz frequency range that remained constant as a function of stimulus variance. The gain of the dendrite-to-soma input/output relationship, in contrast, varied as a function of stimulus variance. When the contribution of the voltage-dependent current Ih was eliminated, the estimated filters lost their band-pass properties and the gain regulation was substantially altered. Our findings suggest that the dendrite-to-soma input/output relationship for proximal apical inputs to CA1 pyramidal neurons is well described as a band-pass filter in the theta frequency range followed by a gain-control nonlinearity that dynamically adapts to the statistics of the input signal.

A RECURSIVE TIME‐VARYING BAND‐PASS FILTER

Geophysics ◽  
1975 ◽  
Vol 40 (3) ◽  
pp. 520-526 ◽  
Author(s):  
Z. J. Nikolic
Keyword(s):  
Data Processing ◽  
Seismic Data ◽  
Processing Time ◽  
Dominant Frequency ◽  
Band Pass Filter ◽  
Time Varying ◽  
Seismic Data Processing ◽  
Pass Filter ◽  
Band Pass

Time‐varying, digital band‐pass filters are extensively used in seismic data processing, since the dominant frequency of reflected signals usually becomes lower and their bandwidth narrower with the passage of time. In routine seismic data processing, time‐varying, digital band‐pass filtering is stepwise.

OBSERVATION AND SIMULATION OF TSUNAMIS INDUCED BY THE 2003 TOKACHI-OKI EARTHQUAKE (M 8.0)

2015 ◽  
Vol 2 (3) ◽  
Author(s):  
Tatsuo Ohmachi ◽  
Shusaku Inoue ◽  
Tetsuji Imai
Keyword(s):  
Rayleigh Wave ◽  
Water Pressure ◽  
Near Field ◽  
Source Region ◽  
Tsunami Source ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Tsunami Simulation ◽  
Sea Bed ◽  
Band Pass

The 2003 Tokachi-oki earthquake (MJ 8.0) occurred off the southeastern coast of Tokachi, Japan, and generated a large tsunami which arrived at Tokachi Harbor at 04:56 with a wave height of 4.3 m. Japan Marine Science and Technology Center (JAMSTEC) recovered records of water pressure and sea-bed acceleration at the bottom of the tsunami source region. These records are first introduced with some findings from Fourier analysis and band-pass filter analysis. Water pressure disturbance lasted for over 30 minutes and the duration was longer than those of accelerations. Predominant periods of the pressure looked like those excited by Rayleigh waves. Next, numerical simulation was conducted using the dynamic tsunami simulation technique able to represent generation and propagation of Rayleigh wave and tsunami, with a satisfactory result showing validity and usefulness of this technique. Keywords: Earthquake, Rayleigh wave, tsunami, near-field

A comparative study on the demodulation capability of a single loop optoelectronic oscillator with and without a dynamic band Pass filter

Optik ◽  
2021 ◽  
Vol 226 ◽  
pp. 165924
Author(s):  
Shantanu Mandal ◽  
Kousik Bishayee ◽  
Arindum Mukherjee ◽  
B N Biswas ◽  
Chandan Kumar Sarkar
Keyword(s):  
Comparative Study ◽  
Band Pass Filter ◽  
Optoelectronic Oscillator ◽  
Pass Filter ◽  
Single Loop ◽  
Band Pass
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