Post History
[In addition to what Olin wrote earlier.] I looked-up one of the references from the textbook, and I may have found the answer which the author had in mind. This entire spectrum must not be pas...
Answer
#2: Post edited
by
Nick Alexeev
·
2022-10-31T22:00:34Z (over 1 year ago)
[In addition to what Olin wrote earlier.]- I looked-up one of the references from the textbook, and I may have found the answer which the author had in mind.
- > This entire spectrum must not be passed on to the player amplifier and loudspeaker. Even though the frequencies above 20 kHz are inaudible, they would overload the player amplifier and set up intermodulation products with the baseband frequencies or possibly with the high-frequency bias current of a tape recorder. Therefore all signals at frequencies above the baseband should be attenuated by at least 50 dB.
- The article also described the DC reconstruction filter. It's a 3rd order RC filter.
- [Here baseband is the audible frequency range between 20 Hz and 20 kHz.]
- D. Goedhart, R. J. van de Plassche, and E. F. Stickvoort, “Digital-to-Analog Conversion in Playing a Compact Disc,” [Philips Technical Review](https://worldradiohistory.com/Philips_Technical_Review.htm), vol. 40, no. 6, 1982, pp. 174-179
- *[In addition to what Olin wrote earlier.]*
- I looked-up one of the references from the textbook, and I may have found the answer which the author had in mind.
- > This entire spectrum must not be passed on to the player amplifier and loudspeaker. Even though the frequencies above 20 kHz are inaudible, they would overload the player amplifier and set up intermodulation products with the baseband frequencies or possibly with the high-frequency bias current of a tape recorder. Therefore all signals at frequencies above the baseband should be attenuated by at least 50 dB.
- The article also described the DC reconstruction filter. It's a 3rd order RC filter.
- [Here baseband is the audible frequency range between 20 Hz and 20 kHz.]
- D. Goedhart, R. J. van de Plassche, and E. F. Stickvoort, “Digital-to-Analog Conversion in Playing a Compact Disc,” [Philips Technical Review](https://worldradiohistory.com/Philips_Technical_Review.htm), vol. 40, no. 6, 1982, pp. 174-179
#1: Initial revision
by
Nick Alexeev
·
2022-10-31T21:59:22Z (over 1 year ago)
[In addition to what Olin wrote earlier.] I looked-up one of the references from the textbook, and I may have found the answer which the author had in mind. > This entire spectrum must not be passed on to the player amplifier and loudspeaker. Even though the frequencies above 20 kHz are inaudible, they would overload the player amplifier and set up intermodulation products with the baseband frequencies or possibly with the high-frequency bias current of a tape recorder. Therefore all signals at frequencies above the baseband should be attenuated by at least 50 dB. The article also described the DC reconstruction filter. It's a 3rd order RC filter. [Here baseband is the audible frequency range between 20 Hz and 20 kHz.] D. Goedhart, R. J. van de Plassche, and E. F. Stickvoort, “Digital-to-Analog Conversion in Playing a Compact Disc,” [Philips Technical Review](https://worldradiohistory.com/Philips_Technical_Review.htm), vol. 40, no. 6, 1982, pp. 174-179