GB20600-2006 Demodulator

The LGS-8G13 is a single chip demodulator fully compliant with the China Digital Television Terrestrial Broadcasting System Standard(GB20600-2006). It uses TDS-OFDM (Time Domain Synchronous - Orthogonal Frequency Division Multiplexing), a core technology on which GB20600-2006 is based. Designed for digital terrestrial reception of high definition, standard definition and other multimedia-based services, the demodulator is intended for indoor, outdoor, fixed, and automotive applications.

The chip takes a digital IF signal as input and converts this signal to baseband.  It then performs the necessary demodulation and FEC (forward error correction) decoding, and provides an MPEG-2 transport stream output in parallel or serial format. With an external time de-interleaver SDRAM, a complete RF to MPEG front-end system that is fully compliant with GB20600-2006 can be implemented with the LGS-8G13 chip.

 

■ Basic Characteristics
  — Package: 128 LQFP, 14x20x1.4 mm
  — Temperature range: -40℃ ~ +70℃
  — Power supply: 1.8V / 3.3V
  — Process: 0.18μm CMOS
  — Power consumption: 800 mW

■ Applications
  — Integrated Digital TVs
  — Set-top-boxes
  — Automobile receivers

■ Development Support
  — Samples
  — Complete Documentation
  — Schematics
  — Evaluation board and software

Product Features
■ Fully compliant with GB20600-2006 standard
■ Automatic parameters discovery and update
■ Signal input format
      —— Digital Intermediate Frequency (IF) input
■ Data output format
      —— MPEG-2 TS (Transport Stream) Synchronous Parallel Interface (SPI)
      —— Synchronous serial and synchronous parallel output mode
■ Automatic recovery functions
      —— Lost signal re-acquisition without external programming
      —— Active impulse noise rejection
      —— Fast acquisition time
■ Power consumption
      —— Normal operation mode: 800mW
■ Excellent multipath channel performance
■ Excellent Single Frequency Network (SFN) performance
■ Optimized for the best performance in all conditions
      ——  Impulse noise, echoes, and fading
■ Complies with RoHS requirements (Pb-free, Green)

Simplified Hardware Design
■ Support for digital IF signal input
■ Standard I²C bus control for the system and demodulator
■ MPEG-TS interface to connect with MPEG decoder chips and media processors