characteristic impedance


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characteristic impedance

[‚kar·ik·tə′ris·tik im′pēd·əns]
(communications)
The impedance that, when connected to the output terminals of a transmission line of any length, makes the line appear to be infinitely long, for there are then no standing waves on the line, and the ratio of voltage to current is the same for each point on the line. Also known as surge impedance.
References in periodicals archive ?
The damping criterion is based on the relative magnitudes of the circuit resistance and sqrt (Ls/Cs) which determines the circuit's characteristic impedance (11).
Charles Grasso, "Measuring Printed Circuit Board Characteristic Impedance Without a TDR," Douglas C.
Most 2D field solvers allow changing a geometry term and exploring the impact on an electrical quality such as characteristic impedance.
The RG58 cable has a characteristic impedance of 50 [ohm].
The relationship between the characteristic impedance of each line Z0, the odd mode impedance Z0o and the even mode impedance Z0e is governed (11) by:
Variable on-chip resistors in the receiver help reduce noise reflections by allowing notebook designers to match the receiving chip impedance to the characteristic impedance of the cable/connector system.
There are only two parameters that define a single ended transmission line; its characteristic impedance and its time delay.
TDR instruments can be used for evaluating the characteristic impedance and propagation delays of single-ended and differential transmission lines.
The characteristic impedance of the circuit board under design is usually the first, and arguably the most important, design parameter.
In point-to-point architectures, the most commonly used termination strategy is a source series resistor, with a resistance selected so that its resistance plus the output impedance of the driver equals the characteristic impedance of the transmission line.
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