Equivalent Series Resistance - Overview


Electric circuit theory deals with ideal resistors, capacitors and inductors, each assumed to contribute only resistance, capacitance or inductance to the circuit. However, all components have a non-zero value of each of these parameters. In particular, all physical devices are constructed of materials with finite electrical resistance, so that physical components have some resistance in addition to their other properties. The physical origins of ESR depend on the device in question.

One way to deal with these inherent resistances in circuit analysis is to use a lumped element model to express each physical component as a combination of an ideal component and a small resistor in series, the ESR. The ESR can be measured and included in a component's datasheet. To some extent it can be calculated from the device properties.

Q factor, which is related to ESR and is sometimes a more convenient parameter than ESR to use in calculations of high-frequency non-ideal performance of real inductors, is quoted in inductor data sheets.

Capacitors, inductors, and resistors are usually designed to minimise other parameters. In many cases this can be done to a sufficient extent that parasitic capacitance and inductance of a resistor, for example, are so small as not to affect circuit operation. However, under some circumstances parasitics become important and even dominant.

Read more about this topic:  Equivalent Series Resistance

Other articles related to "overview":

International Union Of Pure And Applied Chemistry - Publications - Series of Books On Analytical and Physical Chemistry of Environmental Systems
... of Fractal Structures and Processes in Environmental Systems is meant to give an overview of a technique based on fractal geometry and the processes of ... It also gives an overview of the knowledge needed to solve environmental problems ... The book gives an overview of chemical mechanisms, transport, kinetics, and interactions that occur in environmental systems ...
Golden Brown - Overview
... The single was a hit around the world, scaling the Top 10 as far away as Australia ... Its commercial success was probably the single factor that secured The Stranglers their continuing life in pop mainstream for the remainder of the 1980s ...
United States Presidential Election, 1992 - Nominations - Democratic Party Nomination - Overview
... U.S ... Senator Tom Harkin (Iowa) ran as a populist liberal with labor union support ...
Kewanee, Illinois - Schools - Overview
... There are also other schools in Kewanee like Visitation Catholic School home of the Giants, and a community college, Black Hawk College ... Black Hawk College-East Campus is recognized nationally for its equestrian program, as well as livestock judging teams ...
Unified Modeling Language - Topics - Diagrams Overview - Interaction Diagrams
... Interaction overview diagram provides an overview in which the nodes represent communication diagrams ... Communication diagram Interaction overview diagram Sequence diagram The Protocol State Machine is a sub-variant of the State Machine ...