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That design choice makes the effective resistance of the bridged portion to be R i. The resulting input impedance of the i-th stage will be 10 R i. In the simple Kelvin-Varley decade design, the resistance of each stage decreases by a factor of 5: R i+1 = R i / 5. The first stage might use 10 kΩ resistors, the second stage 2 kΩ, the third ...
The equations above find the impedance and loss for an attenuator with given resistor values. The usual requirement in a design is the other way around – the resistor values for a given impedance and loss are needed. These can be found by transposing and substituting the last two equations above; If = =
A simple example of a voltage divider is two resistors connected in series, with the input voltage applied across the resistor pair and the output voltage emerging from the connection between them. Resistor voltage dividers are commonly used to create reference voltages, or to reduce the magnitude of a voltage so it can be measured, and may ...
The star-to-delta and series-resistor transformations are special cases of the general resistor network node elimination algorithm. Any node connected by N resistors (R 1 … R N) to nodes 1 … N can be replaced by () resistors interconnecting the remaining N nodes. The resistance between any two nodes x, y is given by:
The equations above find the impedance and loss for an attenuator with given resistor values. The usual requirement in a design is the other way around – the resistor values for a given impedance and loss are needed. These can be found by transposing and substituting the last two equations above;
Various resistor types of different shapes and sizes. A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
The Steinhart–Hart equation is a model relating the varying electrical resistance of a semiconductor to its varying temperatures.The equation is = + + (), where is the temperature (in kelvins),
In its simplest form a transimpedance amplifier has just a large valued feedback resistor, R f. The gain of the amplifier is set by this resistor and because the amplifier is in an inverting configuration, has a value of -R f. There are several different configurations of transimpedance amplifiers, each suited to a particular application.