| 单词 | pulse modulation |
| 释义 | > as lemmaspulse modulation pulse modulation n. Telecommunications a form of modulation in which a series of initially identical, regularly recurring pulses is varied in some respect (as amplitude or timing), esp. so as to represent the amplitude of an applied signal after successive short intervals of time. ΘΚΠ society > communication > telecommunication > [noun] > signal > modulation choke control1909 modulation1919 frequency modulation1922 pulse modulation1929 phase modulation1930 undermodulation1940 pulse time modulation1944 pulse position modulation1945 PCM1947 pulse amplitude modulation1947 pulse code modulation1947 pulse frequency modulation1950 pulse width modulation1953 pulse duration modulation1956 1929 Proc. IRE 17 1787 It could not be predicted with certainty that the transmitter crystal would provide a suitably constant phase reference for comparison with the echoes, particularly because of the fact that its phase..might be shifted slightly by the pulse modulation of the power amplifiers excited by the crystal circuit. 1945 Electronics Jan. 103/3 With pulse modulation, especially at very high carrier frequencies, problems of modulation at the transmitter are greatly simplified. 1997 Bryologist 100 103/2 Fluorescence data in the lab was acquired using a..pulse modulation fluorometer. < as lemmas |
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