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[Discuss-gnuradio] AM/FM Chipset w/DSP IF
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[Discuss-gnuradio] AM/FM Chipset w/DSP IF |
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Thu, 18 Jul 2002 18:58:58 -0400 |
STMicroelectronics Develops DSP-based Digital AM/FM Radio Chipset That
Directly Digitizes Intermediate Frequency
Combination of BiCMOS front end and 0.18um CMOS baseband processor improves
performance and enables future IBOC-compatible products.
Geneva, July 16, 2002 - STMicroelectronics (NYSE: STM) today announced that
the company is sampling a new AM/FM radio receiver chipset that digitizes
directly the 10.7MHz intermediate frequency, allowing both enhanced
performance and convergence with IBOC (In-Band On-Channel) digital radio in
the future.
Aimed at the open market, the new chipset consists of the TDA7515 analog
front-end chip, realized in high-performance 0.7-micron BiCMOS technology
and the TDA7580 DSP digital baseband processor, realized in 0.18-micron
CMOS. The DSP software embedded in the TDA7580 implements advanced
algorithms that boost receiver performance. These algorithms have been
jointly developed by ST and Bose Corporation, a recognized leader in audio
system technology.
Direct digitization at the intermediate frequency makes the design more
flexible and allows the implementation of complex equalization techniques
that reduce multipath reception effects introduced by adjacent channels in
very difficult weak-signal conditions. Moreover, the processor can adapt to
changing conditions, maintaining excellent reception at all times. A
further benefit of the software-based approach is that additional features
can be added later without redesigning hardware, so products can be
improved and differentiated simply by updating the firmware.
Because of the extensive use of digital techniques, the new chipset also
smoothes the path towards dual standard IBOC/FM receivers, where a single
DSP will have software to handle both, so that an IBOC-equipped radio can
have a user-transparent FM fallback mode for borderline reception
conditions. The digital approach combined with some features of the
front-end chip also means that the chipset can support worldwide tuning
frequencies, so a single application covers all markets with only changes
in the software.
ST provides a complete DSP software solution for the TDA7580 that includes
the implementation of algorithms developed jointly by ST and Bose
Corporation. However, system designers using the chipset may also modify or
extend portion of this standard software package to add new features or
embed their own proprietary knowhow.
The TDA7515 and TDA7580 are supplied in 44- and 64-lead TQFP packages,
respectively. Very few external components are required as most functions
are performed digitally and because a hardware decoder for Radio Data
System (RDS) is included in the TDA7580. The embedded decoder means that
RDS decoding can be performed without using any DSP resources.
Samples of the TDA7515 and TDA7580 are available now and volume production
is scheduled for the fourth quarter of 2002.
About STMicroelectronics
STMicroelectronics, the world's third largest semiconductor company, is a
global leader in developing and delivering semiconductor solutions across
the spectrum of microelectronics applications. An unrivalled combination of
silicon and system expertise, manufacturing strength, Intellectual Property
(IP) portfolio and strategic partners positions the Company at the
forefront of System-on-Chip (SoC) technology and its products play a key
role in enabling today's convergence markets. The Company's shares are
traded on the New York Stock Exchange, on Euronext Paris and on the Milan
Stock Exchange. In 2001, the Company's net revenues were $6.36 billion and
net earnings were $257.1 million. Further information on ST can be found at
http://www.st.com.
For further information please contact:
STMicroelectronics Technical Press Relations:
Richard Stockdill
Tel : +33 4 5040 2558
Fax : +33 4 5040 2540
Saint Genis-Pouilly, France
E-mail: address@hidden
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