| 单词 | beat-frequency oscillator |
| 释义 | > as lemmasbeat-frequency oscillator beat-frequency oscillator n. Electronics (a) a device which combines the outputs of two radio frequency oscillators (one of fixed, and one of variable frequency), to give an output whose frequency equals the difference between the original frequencies; (b) = beat oscillator n. below. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > [noun] > oscillator oscillator1889 crystal oscillator1923 beat-frequency oscillator1959 1959 K. Henney Radio Engin. Handbk. xvi. 66 Beat-frequency oscillators are oscillator circuits in which the output signal is produced by beating together two signals differing in frequency by the output frequency. 1979 Radio Electronics May 80/1 If you want to make sense out of those sounds, you will have to add a beat-frequency oscillator (BFO) to your receiver. 1984 Pract. Wireless Feb. 25 An ordinary all-wave band a.m. receiver may not have a beat frequency oscillator (b.f.o.) available and therefore cannot resolve single sideband (s.s.b.) signals correctly. 1986 Courier Mail (Brisbane) 5 Dec. (Great Outdoors Suppl.) 9/3 While the BFO (beat frequency oscillator) detector is cheap and easy to operate and has good signal and pinpointing capabilities, it suffers from poor depth penetration. < as lemmas |
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