Impedance
From Wikipedia, the free encyclopedia
Impedance may refer to:
- the ratio of voltage to electric current, as in
- Electrical impedance, a measure of opposition to time-varying electric current in an electric circuit.
- Characteristic impedance, a measure of opposition to electric current propagation in a transmission line.
- Impedance matching and Impedance mismatch.
- Vacuum impedance, a universal constant.
- Electromagnetic impedance, a constant related to electromagnetic wave propagation in a medium.
- Mechanical impedance, a measure of opposition to motion of a structure subjected to a force.
- Acoustic impedance, a constant related to the propagation of sound waves in an acoustic medium.
- Linear response function, a general way to represent the input-output characteristics of a system.