The JDA1 is a core cell design for an application specific digital processor which performs both D/A conversion and audio clock generation in a single design. While other DAC and PLL technologies employ expensive double-poly analog IC processes that lag behind the latest high-density VLSI processes, the JDA1 is designed for manufacture using a purely digital process, making it compatible with scalable high-density VLSI circuits like digital audio/video decoders. Its unique architecture yields consistent performance characteristics over all of the supported audio sample rates from a single 27MHz master clock, unlike many other DACs which incorporate an on-board PLL retrofit to an existing design. The JDA1 is capable of accepting 2-channel PCM inputs from any digital source, such as a Dolby Digital®(AC-3) decoder, and it provides analog stereo outputs to drive a standard stereo reproduction system. An optional S/PDIF output is also available.
The JDA1 design is the one of the world's smallest, most cost effective designs for audio D/A conversion processing and audio clock recovery. The complete JDA1 core fabricated in a typical 0.35u CMOS standard cell process, requires a silicon area of less than 1.2 sq. mm. The JDA1 design kit is compatible with Synopsys and Verilog design methodology. JDA1 requires 0.6 micron or better technology, and is designed for synthesis with off-the-shelf gate array or standard cell ASIC libraries.
By combining the JDA1 with the Jacobs Pineda, Inc. J1 Dolby Digital®/MPEG Audio Decoder and J5 3-D Processor core, a complete 3D audio decoding subsystem can be made for DVD or set-top box applications, accepting AC-3/MPEG compressed digital audio in, and producing stereo 3D virtualized analog and SPDIF outputs with a single master clock source.
About Jacobs Pineda, Inc.
JPI is a design firm specializing in high volume, low cost, consumer audio IC designs. Its designs have been licensed and employed by semiconductor and system manufacturers of audio solutions for the consumer and computing markets. Founded in 1995, JPI is a California Corporation with offices in Oakland. CA. For more information on the JDA1 or other JPI audio core cells, please contact Jacobs Pineda Inc. at (415) 641-9194, or visit their web site at http://www.jacobspineda.com .
About Motorola, Inc.
Motorola is one of the world's leading suppliers of communications,
semiconductors and advanced electronic systems and services. Major
equipment businesses include cellular telephones, two-way radio, paging,
data communications, personal communications, automotive, defense and spsace
electronics and computers. Communications devices, computers and
millions of consumer products are powered by Motorola semiconductors.
Motorola worldwide 1994 sales were $22.2 billion. Motorola's Consumer
Broadcast Division is part of the Imaging & Entertainment Solutions
business within the Motorola Semiconductor Products Sector. The Consumer
Broadcast division produces highly integrated custom mixed-signal designs
for set-top-box and television equipment manufacturers. Combining the strengths
of Motorola's leadership position in embedded microprocessors with expertise
in MPEG audio/video design, mixed-signal design and ASIC design methodologies,
the Consumer Broadcast Division offers customers a full line of solutions
for this fast-growing and rapidly changing market. Information
about offerings from the Consumer Broadcast Division is available from
James Stansberry at 602-755-2782.
For more information, visit theMotorola website at http://www.mot.com .
For more information on licensing JDA1 technology contact:
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