San Jose--Nov. 24, 1997--Sony Semiconductor Co. of America (SSA; San Jose), a division of Sony Electronics Inc., announced the CXD1961AQ, a single chip solution for digital satellite broadcast receivers and set-top boxes.
The CXD1961AQ is a highly integrated forward error correction (FEC) decoder device as well as a high performance, low cost digital video broadcast (DVB) compliant, front-end IC. It is also suited for PC and TV applications.
The chip incorporates two high-speed 6-bit A/D converter channels, a QPSK (quadrature phase-shift keying) demodulator with roll-off digital filter for multi-symbol rate and automatic regeneration/recovery of the clock and carrier with reduced external LC filter requirements.
It also includes a frame synchronization circuit including MPEG-2 sync byte recognition and supports both a parallel and a serial data output for added flexibility.
Additional functions include a Viterbi decoder, de-interleaver, Reed-Solomon decoder, and energy dispersal descrambler and channel error monitoring at both the QPSK demodulator output as well as the Viterbi decoder output.
By incorporating these constellation monitor functions, the CXD1961AQ enables OEMs to detect and monitor vital system S/N Ratios (SNR) and assists in antenna positioning for enhanced reception.
The maximum operating frequency of 60 MHz allows a 20-30 Megasymbols per second data rate to support most satellite transponders used by DBS providers in North America.
With the CXD1961AQ, the only required external components are a crystal and a low pass filter (for AGC and NCO/PLL). Sony's new chip uses a cutting-edge 0.4-m, 3-layer metal wire CMOS process and is mounted in a 100-pin plastic QFP package.
The CXD1961AQ complies with satellite broadcasting's use of QPSK as the modulation system and a combination of Reed-Solomon decoding and convolutional decoding with depuncturing support for all DVB rates from 1/2 to 7/8 for error correction.
Sample quantities are currently available for $12 each. Production quantities will be available by the end of the year. Sony is also offering an evaluation board for the CXD1961AQ with a I2C interface to assist consumer OEMs integrating this chip in their set top box designs.
Sony Semiconductor Co. of America
3300 Zanker Rd.
San Jose, CA 95134
(800) 228-SONY 4
Fax: (408) 955-5176
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