| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such problem that reproduced sounds of high tone quality and high fidelity are unable to obtain due to the deterioration of resolution and localization of the sound is not obtained, and the dissatisfaction in the presence due to the unnatural sound is generated, by realizing a reference frequency generator for clock generator, which is excellent in a jitter and wander as a reference oscillator for digital audio and also excellent as the music use. <P>SOLUTION: The method to remarkably improve the acoustic characteristic such as the reduction of noise, improvement of sound resolution, is provided by such a manner that an electrodeless crystal oscillator 2 synchronizing with an atomic clock using a resonance transfer frequency of an atom such as cesium, or an atomic frequency standard 1, is used for the reference oscillator for digital audio, and the generation of the jitter and wander at the time of recording, transmitting and reproducing operation after the analog-digital conversion or digital conversion is made by the respectively intrinsic excellent frequency stability, as well as at the time of digital-analog conversion, is miniaturized. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
