To: John Rieman who wrote (42895 ) 7/15/1999 12:40:00 AM From: BillyG Respond to of 50808
CD-RW and Philips -- almost on topic.....eetimes.com Philips eyes solution to CD-RW problem By Junko Yoshida EE Times (07/14/99, 9:13 p.m. EDT) SUNNYVALE, Calif. — Philips Semiconductors this week launched a new CD audio player chip set designed to handle all forms of CDs including rewritable CDs (CD-RW). The new chip set is the first in the industry to address the re-writeable CD compatibility for CD audio players, according to the company. As more consumers begin to tune into music delivered via Internet and download music files into their CD-RW drives, they are starting to demand that such home-recorded discs can be played back on a variety of audio CD players, including portable CD players, radio-CD cassette boom boxes, or in-car entertainment systems. But many CD audio players cannot play discs recorded on CD-RW audio recorders. That's because discs written by CD-RW drives reflect a much lower level of light than pressed CDs or those written with a write-once CD recorder. That results in the generation of a lower-level electrical signal. Featuring a new CD-RW decoding software and a new data amplifier with adaptable voltage capability, Philips' new chip set, designated CD10, allows consumer system OEMs to design an audio CD player that can also play back CD-RW discs. The CD10 consists of TZA1024, a data amplifier and laser supply circuit, and SAA7324, a digital servo processor. "In order to make the CD10 solution compatible with all CD formats," said Christine Swanson, product marketing manager at Philips Semiconductors based here, "the TZA1024 offers a feature in which an RF gain can be adapted in accordance with different CD formats." The SAA7324 is a custom DSP-based single-chip digital servo controller integrated with a servo, CD decoder and bit stream DAC. It also comes with a newly added CD-RW decoding software, according to Swanson. Philips is making available three versions of the chip set. The CD10 is intended for 2X systems, including portable applications; the CD10LC for budget 1X systems and most stationary systems; and the CD10Auto is designed for in-car use. The company is now sampling the CD10 chip set, priced at $2.80 in quantities of 500,000. The new chips are manufactured in Philips' fab in Nijmegen, the Netherlands, using a 0.25 micron process. To build an audio CD player with CD-RW compatibility, OEMs only need to add an 8-bit microcontroller, a power driver and an LCD controller, according to Swanson. Philips is also making available a developers' kit, which includes the CD10 chip set, supporting interface devices, a main PCB and connector, and user interface PCBs. The company is including software and full documentation, a user manual, assembly drawing and circuit diagrams to the developers' kit.