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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: 83/164頁
文件大小: 2003K
代理商: L64781
Automatic Gain Control (AGC)
2-5
2.3.2 AGC External Loop Filter
The R and C values for the low-pass lter must meet the following
requirement:
Equation 2.2
See Figure 2.2 for the recommended values.
Figure 2.2
AGC Loop Pass Filter
2.3.3 AGC Loop Gain Ks
The gain of the loop, Ks, must adhere to:
Equation 2.3
Where:
F is the slope of the tuner AGC characteristics in dB/V (see
V
cc is the supply voltage.
T
18 is the sampling clock (by default an 18 MHz clock; in fact,
7/128
s).
σ is the RMS of the input signal.
R
AGC
C
AGC
560
s
=
RAGC = 56 k
CAGC = 10 nF
R = 5.6 k
Σ/
Output
3.3 V
FK
s
5.443
T
18
R
AGC C AGC
V
cc
σ
--------------------------------------------------------
=
l64781.book Page 5 Friday, January 19, 2001 1:28 PM
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相關代理商/技術參數
參數描述
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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.
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