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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: 22/164頁
文件大小: 2003K
代理商: L64781
5-48
Registers
DDFS_OFFSET
Frequency Offset
R/W
This species the frequency offset to compensate for in
the DDFS block. Its value depends on the channel
bandwidth and the crystal frequency. The initial value for
the DDFS_OFFSET is 0b11111111111110 (0x3FFE).
Fixed XO and xed IF mode:
With a xed IF, regardless of the channel bandwidth, the
signal is down-converted from the UHF band to the
intermediate frequency (fIF), as shown in Figure 5.5. In
this case there is no frequency error except for the error
generated by the frequency shift.
Figure 5.5
Fixed XO and Fixed IF
Equation 5.6 shows how the DDFS_OFFSET value is
computed with a xed IF:
Equation 5.6
8 MHz
7 MHz
6 MHz
8 MHz
7 MHz
6 MHz
No Frequency Error
fIF = Intermediate Frequency
fIF
DDFS _OFFSET
2
16
ε 10
6
B
------------------------------
=
l64781.book Page 48 Friday, January 19, 2001 1:28 PM
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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
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