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.
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