| 单词 |
time base |
| 释义 |
time base Electronics.
[f. time n. + base n.1]
a. A line on a cathode-ray tube display representing the time axis, usu. horizontally.
b. A signal for uniformly and repeatedly deflecting the electron beam so as to produce such a line, usu. consisting of a saw-tooth waveform.
c. Also time-base generator. A circuit for generating such a signal; a sweep generator.
1925Proc. Physical Soc. XXXVII. 167 Circular and elliptical time-bases were not nearly so useful as a linear and unidirectional base obtainable from a special type of triode oscillator circuit. 1933R. A. W. Watt et al. Applications Cathode Ray Oscillograph ii. 44 The general nature of the e.m.f. desirable as a linear time-base for use with a cathode-ray oscillograph. 1942Electronic Engin. XV. 102/2 An outstanding case where stroboscopic viewing is a necessity is in conjunction with a spiral timebase. Ibid. 664 The mechanism of the time-base circuit. 1959Davies & Palmer Radio Studies of Universe iii. 43 As the speed of radio waves is 3 × 105 km/s, the horizontal trace of the tube, called the time base, can be calibrated in range directly. 1960Practical Wireless XXXVI. 408/2 A lead from the timebase is brought out to the front panel of the oscilloscope. 1962Simpson & Richards Physical Princ. Junction Transistors xiii. 309 This form of operational amplifier..has been used extensively as a time-base generator. 1977Broadcast 7 Feb. 5 (Advt.), VPR-1 systems, with..timebase correction..for installation in studio. |
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