input impedance


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input impedance

[′in‚pu̇t im‚pēd·əns]
(electricity)
The impedance across the input terminals of a four-terminal network when the output terminals are short-circuited.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
As the piezoelectric effect is assumed to be reciprocal transducer input impedance can be measured and then, assuming this reciprocity, it can be used as output impedance.
Thus, the input impedance of the hybrid microstrip antenna is calculated from
Thus, the input impedance of the antenna with the split loop varies drastically.
Preamplifier input impedance was designed for 1 k[ohm] using active impedance matching (R3, Fig.
Because of the body-proximity effects, input impedance, radiation pattern, and realized gain of the tag antenna are influenced [2].
The desired antenna input impedance has to be conjugately matched to tag chip to ensure adequate power transmission to the chip.
Input impedance is 200 k[OMEGA] single-ended or 400 k[OMEGA] differential.
The motivations of this paper is to introduce a flexible universal UHF RFID tag suitable for RFID applications all over the world, develop a systematic procedure to match the tag input impedance to RFID chip, develop general relation to predict the dipole input impedance and finally achieve reasonable size reduction.
By suitably adjusting the loop length "s" and loop-radiating body spacing "h", the input impedance of the tag antenna can be complex conjugate to any desired microchip.
The module's A/D inputs are independently software selectable for [+ or -] 5 VDC or [+ or -]15 VDC ranges and feature high input impedance. The eight isolated inputs are rated for 5 V to 30 VDC and provide 3500 VDC external isolation, while the SeaI/O-570's eight Form C outputs are configurable as normally-open or normally-closed and can switch DC loads up to 24 W.
* A high input impedance and high common mode rejection to minimize electrical interference (120 dB at 60 Hz).
Finally, to match the complex input impedance of the antenna to [Z.sub.0], a short length of microstrip line is used.