Other Passives

This article is being split into components check for duplication prior to updataing

Inductors

An inductor reacts to current, but not to its value, but rather its change. It “tries” to keep the current through it constant. Any change in current causes a voltage across the inductor. The key equation for an inductor ( it is a bit complicated, but anyway here it ) is:

equation here soon

where L = inductance ( units: henry ) V = voltage ( unit: volts ) I = current ( unit: Ampere ) t = time ( unit: seconds )

Uses:

• tuned circuits: a circuit that responds in a special way to some frequencies( s ).
• power supply filter: remove the pulsing DC left from rectification or other noise in the signal.
• Decoupling: usually blocking high frequencies from one part of a circuit from getting in another part.
• boost buck regulators: voltage regulators that decrease or increase voltage.

Links

• Inductor From Wikipedia, the free encyclopedia

Transformers

Transformers are 2 or more inductors where the coils share the same magnetic field. This results in the current in one coil inducing a current in the other. They are commonly used to change the voltage from an AC source to a different voltage. We need much more description and information here. Would you add it?

Comments:

"Ferrites? I don't know much about 'em, I only use ferrites in switching regulators." --National Semiconductor's Bob Pease

Can be replaced in many circumstances with an impedance inverter using only an opamp, a capacitor, and a few resistors.