欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: L64781
廠商: LSI CORP
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝: PLASTIC, QFP-100
文件頁數: 57/164頁
文件大小: 2003K
代理商: L64781
Using the L64781 Chip in a Receiver
1-3
build a system because the clock and frequency loops, as well as the
DVB-T/DVB-S-compliant concatenated FEC decoder, are incorporated
into the device. The L64781/L64118 chip combination forms the core of
a receiver designed for DVB-T.
Figure 1.1
Receiver Architecture
Figure 1.1 shows the basic structure of a terrestrial receiver. The UHF
(or, possibly, VHF) signal from the antenna passes through a tuner
module that delivers a low intermediate-frequency (IF) signal to the
L64781 chip. The L64781 chip performs all the essential functions for
COFDM demodulation, including the nal steps of error correction. It
requires a sampling-frequency free-crystal oscillator slightly greater than
18.29 MHz1 for the digital clock loop. The L64781 delivers soft-decision
information to the concatenated FEC block, which then completes the
error correction process, delivering an MPEG-2 transport stream. Other
MPEG-standard LSI Logic chips (for example, the L64118 and the
L64x05) can then:
Demultiplex the MPEG-2 transport stream into its coded audio,
coded video, and data components
Deal with conditional access
XO
Tuner
L64781
AFC
AGC
MPEG
TS Demux
System CPU
L64118
AGC = Automatic Gain Control
AFC = Automatic Frequency Control
MPEG
A/V Decoder
L64x05
1. More precisely, 128/7 MHz; that is: 18.28571428.... MHz (+ a few ppm in digital-loop mode).
l64781.book Page 3 Friday, January 19, 2001 1:28 PM
相關PDF資料
PDF描述
L6561 0.7 A POWER FACTOR CONTROLLER, PDIP8
L6566ATR 0.8 A POWER FACTOR CONTROLLER WITH POST REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO16
L6605D SPECIALTY CONSUMER CIRCUIT, PDSO20
L6605 SPECIALTY CONSUMER CIRCUIT, PDIP18
L6660 SPECIALTY CONSUMER CIRCUIT, PDSO24
相關代理商/技術參數
參數描述
L64782 制造商:未知廠家 制造商全稱:未知廠家 功能描述:L64782 Single-Chip COFDM Receiver
L6480 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:The L6480, realized in analog mixed signal technology, is an advanced fully integrated solution suitable for driving two-phase bipolar stepper motors with microstepping.
L64801GC-20 制造商:未知廠家 制造商全稱:未知廠家 功能描述:32-Bit Microprocessor
L64801GC-25 制造商:未知廠家 制造商全稱:未知廠家 功能描述:32-Bit Microprocessor
L64801GM-20 制造商:未知廠家 制造商全稱:未知廠家 功能描述:32-Bit Microprocessor
主站蜘蛛池模板: 白朗县| 紫金县| 保德县| 梅河口市| 哈巴河县| 茌平县| 扬州市| 乐昌市| 平邑县| 高清| 岚皋县| 德庆县| 乾安县| 沿河| 金堂县| 东港市| 长沙县| 黄骅市| 桓台县| 红桥区| 徐州市| 合江县| 察隅县| 阿鲁科尔沁旗| 蕉岭县| 南部县| 平利县| 陆川县| 炉霍县| 元阳县| 黔江区| 忻城县| 桦川县| 屏南县| 海兴县| 平塘县| 永新县| 道真| 百色市| 阿勒泰市| 阳西县|