参数资料
型号: L64781
厂商: LSI CORP
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封装: PLASTIC, QFP-100
文件页数: 81/164页
文件大小: 2003K
代理商: L64781
Analog-to-Digital Converter (ADC)
2-3
Figure 2.1
DTTV Demodulator Architecture
2.2 Analog-to-Digital Converter (ADC)
The L64781 uses an internal 10-bit ADC cell. It also offers a 10-bit
parallel port for connection to an external, 10-bit ADC. The ADC features:
4.57 MHz low-IF center frequency input
6, 7, or 8 MHz input bandwidth
ADC
Real-to-
Complex
FFT
Timing
Sync
Frequency
Sync
CPE
Correction
Viterbi
Metrics
Frame Pulse
Conguration
Quantizer
Low IF
Input
mP Interface and
XO
AGC Control
Timing Control
Digital
AGC
Detect
Analog
Interpolator
Frequency
Filter
Shift
AFC Control
Digital
AFC Control
Analog
Timing Control
TPS Decoder
Reed-Solomon
Viterbi
Decoder
Synchronizer
Reed-Solomon
Decoder
Descrambler
Serial/Parallel
Interface
Channel Output
(MPEG-2 Transport
Stream)
P Serial
Interface
Σ
4-Bit Soft Decision
in BPSK Mode
Channel
Estimation
Format
Demux Output
Information
Convolutional
Deinterleaver
Inner Symbol
& Bit Deintlv.
Σ
l64781.book Page 3 Friday, January 19, 2001 1:28 PM
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