| 摘要 |
<p>A digital signal attenuation circuit for a CD-I player, specially designed to digitally attenuate an audio signal read-out from a CD-I disc, which comprises a 1/6 divider 130 for dividing by 6 an attenuation control signal inputted from a controller 10 and outputting a quotient signal and a remainder signal, a first attenuator 110 for attenuating a 16-bit parallel digital audio signal obtained from a CD-I disc by -1dB within the range of 0 to -5dB in accordance with the remainder signal from the 1/6 divider, and a second attenuator 120 for attenuating an output signal of the first attenuator by -6dB within the range of 0 to -96dB in accordance with the quotient signal from the 1/6 divider. By means of the invention, the audio signal can be attenuated precisely by -1dB within the range of 0 to -96dB, regardless of the environmental conditions, and the overall attenuation circuitry can be greatly simplified. <IMAGE></p> |
