| 释义 |
ˌmultiviˈbrator Electronics.
[ad. F. multivibrateur (Abraham & Bloch 1919, in Compt. Rend. CLXVIII. 1107), f. multi- multi- + vibrateur vibrator.]
A device that consists of two amplifying valves or transistors, each with its output connected to the input of the other, and produces an oscillatory signal rich in harmonics and capable of being triggered and stabilized by an applied sinusoidal signal of slightly higher frequency (the form of the coupling determining the resonant frequency of the device and whether it is astable, bistable, or monostable).
1919Sci. Abstr. B. XXII. 287 The source of oscillations which has been found very successful in operation has been called a ‘multivibrator’. It possesses, besides the fundamental wave-length, all the harmonics from 1 up to two or three hundred. 1940Amat. Radio Handbk. (ed. 2) xiv. 219/1 A multi-vibrator operating on 10 kc can be readily locked by a few volts..of 100 kc frequency, and the harmonics of the multivibrator stage will produce carrier frequencies spaced throughout the radio-frequency spectrum at 10 kc intervals with a precision equal to that of the locking source. 1969J. J. Sparkes Transistor Switching iii. 52 The multivibrator can, of course, produce square waves as well as rectangular waves simply by ensuring symmetry between the two halves of the circuit. 1971J. H. Smith Digital Logic iv. 75 Digital systems frequently need a multivibrator, or at least a source of continuous signals. |