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Demodulator enables TV receivers to be 'digital cable ready'

Posted: 13 Jan 2005 ?? ?Print Version ?Bookmark and Share

Keywords:stmicroelectronics? st? digital demodulator? demodulator? stv0370?

STMicroelectronics (ST) unveiled a single-chip, fully integrated digital demodulator that is designed to be the front-end device in advanced interactive cable-ready digital TV receivers and in terrestrial and cable STBs in the United States.

The multistandard STV0370 supports ATSC (Advanced Television Systems Committee) standard A/53 Annex D (8VSB2) for use in digital terrestrial receivers, as well as the ITU-T J.83/B (US Cable) specification for cable TV. In addition, its support for downstream interactive OOB (Out of Band) QPSK modulation and fully integrated superheterodyne down conversion tuner, which eliminates the need for external OOB tuner circuitry, will allow TV receivers that use the chip to be labeled 'digital cable ready' under FCC (Federal Communications Commission) regulations.

Combining this cost-effective digital demodulator with the company's STi7710 STB decoder creates the lowest cost platform available on the market which is able to meet the requirements of multiple high definition (HD) digital TV standards worldwide, said the press release.

"The STV0370 is the best in class HD demodulator designed for U.S. HDTV applications, enabling NIM manufacturers and STB makers the ability to cost reduce their system while giving viewers the advanced features they now expect as standard within the new fast growing HD market," said Armando Caltabiano, GM for ST's Retail Multimedia and Satellite Division. "The STV0370 and STi7710 U.S. TV platform is likely to enjoy the same success that the STV0361 plus STi5518 combination have achieved in European DVB-T with current 92 percent market share."

The chip is extremely robust against multi-path signals and echoes, offering enhanced indoor and outdoor antenna reception, said the company. It supports the CEA Antenna Control Interface Standard (EIA/CEA-909, parts A and B) which allows viewers to use Smart Antenna technology to optimize reception by electronically adjusting the antenna gain, polarization and beam direction, rather than by physical positional adjustment.

For easy control by system software, the demodulator is managed through a 2-wire I?C interface. On-chip features include high-performance 10bit and 8bit ADCs, integrated SRAM for byte interleave processing so that no external memory is required, and dedicated I?C repeaters for tuner control to improve RF performance and increase digital noise immunity.

The new chip is produced using the company's 90nm process technology, ensuring lower cost through the use of a smaller sized die, and reduced power consumption. It is supplied in a LQFP 128-pin package with exposed paddle, and is available in sample quantities. Full production of the device, priced at $8 for large volumes, is planned for Q1 2005.

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