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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: 84/164頁
文件大小: 2003K
代理商: L64781
2-6
Architectural Overview
Figure 2.3
AGC Characteristic
With an RMS of
, a supply voltage of 5 V, and a tuner
characteristic of 50 dB/V, the loop gain is:
Equation 2.4
Leading to:
Equation 2.5
To code Ks, LSI Logic uses an approximation to the nearest power of two.
LSI Logic uses the AGC_GAIN[2:0] register, with the following
correspondence:
Equation 2.6
Because the AGC_GAIN can have only a limited number of values, the
same is true of Ks. Thus:
Equation 2.7
In our example, AGC_GAIN=4isthe most appropriate value, giving a
value of
.
V
20log(f(V))
Slope: F
σ
0.283
=
FK
s
5.443
7 128
() s
560
s 5 0.283
--------------------------------------------
3.76
10
4
×
==
K
s
7.4
10
6
×
=
K
s
2
8
2
AGC GAIN
AGC GAIN
K
s
log
22
log
----------------
4
K
s
1.52
10
5
×
l64781.book Page 6 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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