| 释义 |
demodulate, v. Electr.|diːˈmɒdjʊleɪt|
[Back-formation f. demodulation n.]
trans. a. To subject to demodulation; to separate a modulating signal from (a modulated wave or carrier). b. To recover (a modulating signal) from or from a modulated wave or carrier.
1932Jrnl. Inst. Electr. Engin. LXX. 351/1 Since the latter [sc. the Kerr cell] has an approximately bi-quadratic law, it would rectify and de-modulate a high-frequency signal. 1957D. G. Fink Television Engin. Handbk. xvi. 150 The second method of separating the three signals is to detect the sound signal in one detector and to demodulate the luminance and chrominance signals in another detector. 1959R. L. Shrader Electronic Communication xvii. 532 A means of detecting, or demodulating, the modulation in the signal. 1970J. Earl Tuners & Amplifiers ii. 47 The left and right audio signals are demodulated alternately from the two sides of the ‘modulation envelope’. 1977Sci. Amer. Feb. 63/2 The earth station amplifies and demodulates the television carrier. 1983E. Trundle Beginner's Guide Videocassette Recorders iv. 55 For luminance the basic idea is to modulate the signal on to an FM carrier for application to the recording head, and demodulate it to baseband during the replay process.
Hence deˈmodulated, deˈmodulating ppl. adjs.
1933Proc. IRE XXI. 210 A value of setting was found at which the modulations of the local oscillator just became intelligible..and below which they appeared as..a demodulated signal. 1948A. L. Albert Radio Fund. xi. 427 All other components that exist in the demodulated signal either are rejected or are of little consequence. 1971D. M. Costigan Fax iv. 106 Fax terminal equipment normally includes its own modulating and demodulating circuitry. 1986Electronics 2 June 25/1 Sampling for analog-to-digital conversion is performed on the demodulated luminance and chrominance signals. |