| 单词 | power amplifier |
| 释义 | > as lemmaspower amplifier power amplifier n. an amplifier designed to increase the power of an electrical signal to the level required to drive a device or circuit, esp. a speaker. ΘΚΠ the world > physical sensation > hearing and noise > audibility > sound magnification or reproduction > [noun] > amplifier power amplifier1920 buffer amplifier1933 preamplifier1934 amp1945 power amp1947 logarithmic amplifier1954 preamp1955 head1968 1920 Jrnl. Inst. Electr. Engineers 58 896/1 The grid of the power amplifier is given a negative potential. 1961 G. A. Briggs A to Z in Audio 16 The final stage is the power amplifier designed to feed the loudspeaker with a few watts of audio power. 1999 Wired Jan. 56/2 Conrad-Johnson..offers a five-channel power amplifier that's more than ready for film soundtracks and the digital surround sound encoded on DVD movies. < as lemmas |
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