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参数资料
| 型号： | U4479B-MFLG3 |
| 英文描述： | DVB-Cable IF Converter and Full Multi-Standard Video-/Sound IF Processing |
| 中文描述： | 的DVB -电缆中频转换器和完整的标准Video-/Sound中频处理 |
| 文件页数： | 1/11页 |
| 文件大小： | 257K |
| 代理商： | U4479B-MFLG3 |
U4479B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A2, 14-Jan-98
1 (11)
DVB-Cable IF Converter and
Full Multi-Standard Video-/Sound IF Processing
Description
The U4479B is a bipolar circuit for the processing of
cable DVB IF (Digital Video Broadcasting) and multi-
standard analog TV IF signals. The combi circuit
processes QAM modulated IF signals, all TV video IF
with negative/ positive modulation and the FM/ NICAM,
AM sound IF signals. With 5 V supply voltage the IC is
suitable for cable DVB receiver (set top boxes).
Features
D 5 V supply voltage; low power consumption
D DVB signal processing with a converter for the 2nd IF;
VCO is controlled by an external PLL
D Active carrier generation by FPLL principle
(frequency-phase-locked-loop) for true synchronous
demodulation in the “analog mode”
D Switchable VCO frequency (33.4/38.9/43.0 MHz)
D Very linear video demodulation, good pulse response
and excellent intermodulation figures
D Bandwidth of the output signal 10 MHz (–1 dB) in
DVB mode
D Alignment-free AFC
D AGC for negative modulation signals (peak sync
detection) and for positive modulation (peak white/
black level detector)
D AGC with average detection for the QAM modulated
DVB signal, reference level is adjustable
D Tuner AGC with adjustable take over point
D Alignment-free quasi parallel sound (QPS) mixer for
FM/NICAM sound IF signals
D Complete alignment-free AM demodulator with gain
controlled AF output
D Separate SIF-AGC with average detection
D Parallel operation of the AM demodulator and QPS
mixer (for NICAM-L stereo sound)
D Two IF inputs for DVB-/Analog Video IF
D One sound IF input
Ordering Information
Extended Type Number
Package
Remarks
U4479B-MFLG3
SO28
Taped and reeled
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