Results 251 to 260 of about 242,126 (310)
Some of the next articles are maybe not open access.
2010
Impedance is the relation between the pressure difference and flow of a linear system, for sinusoidal or oscillatory signals. Impedance completely describes the system and it can be derived from pulsatile pressure difference and pulsatile flow and the application of Fourier analysis.
Nicolaas Westerhof +2 more
openaire +1 more source
Impedance is the relation between the pressure difference and flow of a linear system, for sinusoidal or oscillatory signals. Impedance completely describes the system and it can be derived from pulsatile pressure difference and pulsatile flow and the application of Fourier analysis.
Nicolaas Westerhof +2 more
openaire +1 more source
Input impedance of microstrip antennas
IEEE Transactions on Antennas and Propagation, 1982Using Richmond's reaction integral equation, an expression is derived for the input impedance of microstrip patch antennas excited by either a microstrip line or a coaxial probe. The effects of the finite substrate thickness, a dielectric protective cover, and associated surface waves are properly included by the use of the exact dyadic Green's ...
M. Deshpande, M. Bailey
openaire +1 more source
Miniaturized high input impedance preamplifier
Physiology & Behavior, 1967Abstract A transistorized high input impedance and low noise preamplifier which can be mounted on the electrode positioner in a chronic preparation for the recording of unit discharges is described.
Yutaka Oomura +2 more
openaire +1 more source
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 2002
The input impedance of high-input-impedance buffers with a bootstrapped biasing circuit and supply rails may attain values much larger then it would correspond to the open-loop gain of the operational amplifier used. Similarly, the efficiency of suppression of capacitance connected to the inputs is unexpectedly high, although not that of the opamp ...
S. Lanyi, M. Pisani
openaire +1 more source
The input impedance of high-input-impedance buffers with a bootstrapped biasing circuit and supply rails may attain values much larger then it would correspond to the open-loop gain of the operational amplifier used. Similarly, the efficiency of suppression of capacitance connected to the inputs is unexpectedly high, although not that of the opamp ...
S. Lanyi, M. Pisani
openaire +1 more source
Differential amplifier input impedance
Proceedings of the IEEE, 1970The analysis of a simple differential amplifier excited by two separate voltage sources reveals that the input impedance which loads the voltage source at the inverting input is not a constant but rather is a function of the characteristics of each voltage source.
openaire +1 more source
High input impedance biological amplifier☆
Physiology & Behavior, 1967Abstract A low level high input impedance general purpose biological amplifier is described.
M WAYNER, R PETERSON, Y OOMURA, H OOYAMA
openaire +1 more source
2008 18th International Conference Radioelektronika, 2008
A circuit diagram and an equivalent circuit of high-input-impedance buffer stage with bootstrapped input biasing resistor and power supply nodes are given. The efficiencies of the bootstrapping of the input biasing resistor and the power supply nodes are simulated in the equivalent circuit.
Jan Hribik +2 more
openaire +1 more source
A circuit diagram and an equivalent circuit of high-input-impedance buffer stage with bootstrapped input biasing resistor and power supply nodes are given. The efficiencies of the bootstrapping of the input biasing resistor and the power supply nodes are simulated in the equivalent circuit.
Jan Hribik +2 more
openaire +1 more source
Assessment of Cerebrovascular Hydraulic Input Impedance
IEEE Transactions on Biomedical Engineering, 1976The feasibility of measuring the individual input impedance in each primary arterial input to intracranial structures was examined in the anesthetized dog. From a Fourier analysis of experimental pressures and flows, carotid and vertebral input impedances with the corresponding components of hydraulic power were computed, giving the anterior, posterior,
openaire +2 more sources
Respiratory input impedance measurement: Forced oscillation methods
Medical & Biological Engineering & Computing, 2001The paper reviews how forced oscillation techniques (FOT) for measuring respiratory input impedance Zrs,in have recently been used in clinical applications. Zrs,in is clinically relevant, as it provides data on both the resistive, Rrs, and nonresistive, Xrs, components of the respiratory system. Additionally, when excitatory test signals extending into
D, MacLeod, M, Birch
openaire +2 more sources
2015 XXth IEEE International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED), 2015
Integra-differential equation of Leontovich-Levin played a great role in the development of a theory of thin linear antennas. It is characterized by strict formulation of a problem and by possibilities of evolution of its solution procedure [1]. Analysis of the results obtained by using this equation allows us to clarify separate questions of the ...
openaire +1 more source
Integra-differential equation of Leontovich-Levin played a great role in the development of a theory of thin linear antennas. It is characterized by strict formulation of a problem and by possibilities of evolution of its solution procedure [1]. Analysis of the results obtained by using this equation allows us to clarify separate questions of the ...
openaire +1 more source