Very generally, connecting cables and devices together which have the same impedance value in ohms.
A video signal occupies a wide spectrum of frequencies, from nearly DC (0 Hz) to 6 MHz. If the output impedance of either the video source, cable or input impedance of the receiving equipment are not properly matched, a series of problems may arise. Loss of high frequency detail and color information as well as image instability, oscillations, snow, ghost images and component heat-up may result. Proper connections and cable types provide correct impedances. (See LOAD RESISTANCE)
Converting the output impedance of a device to match the input impedance of the device it will feed.
Circuits that generate audio or video signals are designed to work with a certain load (impedance). When connecting devices in a system, it is important that the impedance specifications are adhered to. If the impedance of the load is not matched to that of the source, there could be undesirable results, such as loss or distortion of the original signal, reflections, etc.
The process in which the input impedance of a connected load (loudspeaker) is designed to be equal to the output impedance of the source (e.g. amplifier), thereby giving maximum transfer of energy, minimum reflection, and minimum distortion. In general the source should be of lower impedance that the load. is more impulsive in nature than it is steady state.
Having or converting the output impedance of a device so that it matches the impedance of the input it will feed.
The process of converting the output impedance of some RF device- which is not 50ohms-to 50ohms, so that it can be operatively connected to some other component.
Matching the output impedance of a source to the input impedance of a load to attain maximum power transfer.
The act of designing a circuit such that if the circuit is opened at any point, the impedance measured in either of the two resulting branches is equal. Maximum power is transferred through a circuit when impedances are matched.
A circuit designed technique that ensures maximum power transfer between a source and its load.
The connection of an additional impedance to an existing one in order to achieve a specific effect, such as to balance a circuit or to reduce reflection in a transmission line.
Impedance matching is the practice of attempting to make the output impedance of a source equal to the input impedance of the load to which it is ultimately connected, usually in order to maximise the power transfer and minimise reflections from the load. This only applies when both are linear devices. The concept of impedance matching was originally developed for electrical power, but can be applied to any other field where a form of energy (not just electrical) is transferred between a source and a load.