Frequency conversion

Frequency conversion may refer to different processes affecting frequency of physical phenomena:


 * A frequency changer, an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency
 * A variable-frequency drive, a type of frequency changer
 * Frequency conversion in nonlinear optics may refer to various manipulations of the frequency of light
 * A Heterodyne is used in signal electronics to convert frequencies