| 单词 | intermediate frequency |
| 释义 | > as lemmasintermediate frequency intermediate frequency n. Electronics the frequency to which an incoming carrier wave is converted by the frequency changer of a superheterodyne receiver; abbreviated I.F. n. at I n.1 Initialisms. ΘΚΠ society > communication > telecommunication > [noun] > signal > frequency or band of frequencies high frequency1842 low frequency1900 voice frequency1905 audio frequency1913 pulsatance1919 medium frequency1920 side frequency1920 intermediate frequency1924 bass1930 frequency1943 frequency spectrum1955 1924 Proc. IRE 12 540 Three intermediate frequency amplifiers. 1947 D. G. Fink Radar Engin. x. 504 The [radar receiver] system which avoids the foregoing difficulties is the superheterodyne, which introduces an initial change from radio frequency to a lower frequency (intermediate frequency) followed by a high-gain amplification at this frequency. 1968 B. P. Lathi Communication Syst. iii. 202 The advantage of conversion to an intermediate frequency is that to receive different stations it is necessary to tune only the first stage (and the local oscillator). All of the amplification is achieved at a constant intermediate frequency and needs no tuning. < as lemmas |
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