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A resistor network refers to a number of resistors configured into a given pattern. Most often, these networks use resistors connected end-to-end in series; however, a number of variations exist where the resistors are connected in parallel or series-parallel sequences resembling ladders. In all instances, the resistors in these networks act as voltage dividers, which divide the voltage applied to the circuit into smaller amounts. Practically, resistor networks are used to provide fractional supply voltages in various circuits or to perform digital-to-analog and analog-to-digital conversion functions.
Resistors are electronic components that resist the flow of electrical current by dissipating its voltage in a manner called dropping. Simply put, a resistor will drop a percentage of a circuit’s voltage. That percentage is equal to the value of a given resistor, in ohms, when compared to the circuit’s total resistance. For example, a 10-ohm resistor will drop 10% of the voltage in a circuit that has 100 ohms worth of resistance.