Results 271 to 280 of about 242,126 (310)
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Measurement of aortic input impedance in rats
American Journal of Physiology-Heart and Circulatory Physiology, 1994Measurement of aortic input impedance in the rat is complicated by a high basal heart rate but is possible if appropriate compensation is made for frequency-dependent errors in modulus and phase resulting from analog filters in the equipment and from nonalignment of pressure and flow sensors.
G F, Mitchell +3 more
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Mechanical input impedance of human teethin vivo
Medical & Biological Engineering, 1968The mechanical input impedance of teethin vivo has been measured over the frequency range of 60–5000 c/s. A generator was used which delivered a sinusoidal force of variable frequency and constant peak-to-peak amplitude of 4·4×104 dyn. Our data plus those of others indicate that the suspensory apparatus of the tooth consists of several equivalent ...
D H, Noyes, J W, Clark, C E, Watson
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High input impedance current conveyor filters
International Journal of Electronics, 1983Abstract Two new active RC canonic band pass filters are presented. The new configurations offer a very high input impedance and employ single grounded resistors for independent adjustments of ω0, Q and gain.
SYED FIDA HUSSAIN NAQSHBENDI +1 more
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Input impedance from fractal multilayers
17th Congress of the International Commission for Optics: Optics for Science and New Technology, 1996An impedance model is applied to the resolution of reflection problem by a multilayer Cantor bars fractal. We obtain an iterative method which consists in replacing the structure by a single surface.
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Low input impedance current integrator
Nuclear Instruments and Methods, 1963Abstract The design and fabrication of a transistor current integrator are described. The circuit has very low input impedance—about 100 ohm, and is particularly suitable for measuring the beam current from the target of a Van de Graaff accelerator in which water cooling is employed. The operating range of the current integrator is 0–30 μA. Accuracy
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High Input Impedance All-Pass Circuit
IETE Journal of Research, 1994A novel operational transconductance amplifier (OTA) based all-pass (AP) circuit exhibiting essentially infinite input impedance and facilitating non-interactive electronic control of gain and phase without disturbing the AP condition is proposed. A large amount of gain is attainable from the circuit as the scale factor is a function of the product of ...
N A Shah, N A Tantray
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Input impedance of rectangular microstrip antennas
IEE Proceedings H Microwaves, Antennas and Propagation, 1988Rectangular half-wavelength microstrip antennas, fed by a coaxial line at the centre of one of the radiating edges, are treated as lossy transmission lines open-circuited at one of the ends. Closed form expressions are developed by which the input impedance of these antennas may be very accurately computed.
A.K. Bhattacharjee +4 more
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Loop Gain, Input Impedance and Output Impedance of Feedback Amplifiers
IEEE Circuits and Systems Magazine, 2008Introductory treatments of feedback amplifiers commonly contain inconsistencies, or present results as universal when in fact they need qualification. Loop gain, overall gain, input impedance and output impedance are instances. A case can therefore be made for rigorous development, even in a first course, provided mathematical rigor can be combined ...
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High-input impedance filters using FTFNs
International Journal of Electronics, 1998High-input impedance bandpass, lowpass, and highpass filters using two fourterminal floating nullors (FTFNs) are presented. Among these filters, the bandpass and lowpass filters require only grounded capacitors which are suitable for monolithic integration.
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