| 释义 |
oscillator|ˈɒsɪleɪtə(r)|
[agent-n. in L. form from L. oscillāre to oscillate.]
1. One who oscillates in action or thought.
1835De Quincey Tory's Acc. Toryism, etc. Wks. 1853–5 XV. 207 All others are temporisers, waiters upon occasion and opportunity, compromisers, oscillators.
2. a. An apparatus for generating oscillatory electric currents by non-mechanical means.
1889Electrician 9 Aug. 359/1 A practical application is to the theory of a Hertzian oscillator. 1898Newspaper, Mr. Tesla..claims that he can produce, by means of an instrument called the electrical oscillator, a vibratory force capable of causing brilliant lights to burst forth without material connection with an electrical instrument. 1907,1908[see Hertzian a.]. 1933Geogr. Jrnl. LXXXII. 327 In the shoal range the sound producer is a Type 399 oscillator mounted inside the ship. 1951A. Sheingold Fund. Radio Communication xii. 263 Special oscillators, viz., the klystron and the magnetron, have been designed for operation in the very-high-frequency range. 1962A. Nisbett Technique Sound Studio xii. 202 An oscillator is a valid ‘concrete’ sound source. 1970B. Zeines Electronic Communication Syst. viii. 327 Essentially, a feedback oscillator is an amplifier deriving its input signal from its own output. 1977N. Freeling Gadget v. 222 The oscillator is a multi-vibrator affair using a couple of integrated circuit chips.
b. A person who causes or allows a radio to transmit radio waves (cf. oscillate v. 1 d).
1927Daily Tel. 1 Mar. 6 Cases where engineers..have succeeded in tracking down oscillators. 1927Glasgow Herald 20 Sept. 8/2 The running-to-earth of offending oscillators.
3. Something that moves to and fro.
1911Sci. Abstr. A. XIV. 402 In the theory referred to [of 1901] the emission of the elements of energy is assumed to be excited by the continuous steady absorption of energy from the radiation incident upon one of the assumed oscillators. This the author [sc. Planck] now replaces by the assumption that the emission and absorption are entirely independent. 1936P. M. Morse Vibration & Sound ii. 27 Every driven oscillator is mass controlled in the frequency range well above its natural frequency ν0, is resistance controlled near ν0.., and is stiffness controlled for frequencies much smaller than ν0. 1970G. K. Woodgate Elem. Atomic Struct. iii. 45 In trying to make a model of a one-electron atom out of three classical oscillators (one for each direction of polarization) we do not take account of the fact that the atom can emit many frequencies..whereas the classical oscillators emit only one frequency. 1973Country Life 19 July 151/2 The best oscillators have a device which enables the degree of oscillation to be varied from a wide to a narrow throw.
4. attrib., as oscillator circuit.
1931Moyer & Wostrel Radio Handbk. vii. 390 (heading) Typical oscillator circuits. 1970B. Zeines Electronic Communications Syst. viii. 326 Oscillator circuits are commonly used in communication systems. |