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Demodulator IC – excellent DTV broadcast reception

Micronas unveiled the fourth generation of its COFDM (coded orthogonal frequency division multiplex) demodulator IC: The DRX 3973D addresses all types of atmospheric and dynamic interferences with new adaptive compensation schemes and paves the way for excellent reception in the more vulnerable DVB-T regions (Digital Video Broadcast Terrestrial), as found in fringe signal areas and indoor reception. The chip meets all international performance requirements including Nordig Unified, DTG and EICTA for DVB-T reception according to ETS 300 744 and targets manufacturers of digital or hybrid TV sets, set-top boxes, recording equipment, PC-TV cards and Network Interface Modules. In combination with Micronas' DRX 3960A, the DRX 3973D with its integrated PGA (Programmable Gain Amplifier) offers an economic solution, based on only one tuner and one SAW filter, for a hybrid front-end allowing the user to receive either analog or digital broadcasts. Superior digital and analog adjacent channel performance, QEF better than 40dB I/C with just one SAW filter, is ensured through cutting-edge digital filtering techniques in combination with a high-performance A/D converter and PLL. As a result of parallel broadcasting of analog and digital television and/or the increased amount of digital broadcasting, adjacent channel performance will gain importance for distortion-free reception. Progressive channel estimator algorithms provide exceptional performance in multipath and dynamic echo conditions, an especially important feature for single-frequency networks and indoor reception. A state-of-the-art noise cruncher suppresses disturbances radiated by for example cars, electric motors and household appliances. An integrated microprocessor performs autonomous detection and operation of all possible DVB-T modes without requiring interaction with the host processor. Sample quantities for customer analysis of the DRX 3973D, which comes in a small footprint PMQFP64 package, will become available in July 2004. Production quantities are planned for shipment in the fourth quarter of 2004. Micronas GmbH, 79108 Freiburg, Germany.
www.micronas.com

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