| 摘要 |
PURPOSE:To enable high-level acoustic reproduction by considerably suppressing analog audio signal distortion caused by quantizing error by generating driving force at an exact rate corresponding. the quantization of digital signals. CONSTITUTION:Respective voice coils L1-LN wound around a voice coil bobbin 1 are weighted so as to generate the driving force corresponding to the respective bits of the digital signals and on the other hand, the polarity of a fixed voltage impressed to the respective voice coils L1-LN is switched corresponding to the binary signal of the respective bits of digital signals by inverted switches SW1-SWN at a polarity switching part 3. Thus, the direction of a current flowing to the voice coils L1-LN is set corresponding to the above-mentioned binary signal. |
