the middle frequency in a superheterodyne receiver, at which most of the amplification takes place. Abbreviation: if
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Origin of intermediate frequency
First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for intermediate frequency
This is spoken of either as the “super-heterodyne” or as the “intermediate-frequency amplification” method of reception.
The system of intermediate-frequency amplification solves the difficulty and we shall see how it does so.
British Dictionary definitions for intermediate frequency
electronics the frequency to which the signal carrier frequency is changed in a superheterodyne receiver and at which most of the amplification takes place
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012