參數(shù)資料
型號： T4258NFNG3
廠商： ATMEL CORP
元件分類： 接收器
英文描述： AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO44
封裝： SSOP-44
文件頁數(shù)： 22/38頁
文件大?。?/td> 443K
代理商： T4258NFNG3
29
T4258N
4566B–AUDR–02/04
Application Information
AM Prescaler (Divider)
Settings
The AM mixer is used for up conversion of the AM reception frequency to the IF fre-
quency. Therefore an AM prescaler is implemented to generate the necessary LO from
the VCO frequency. For the reception of the AM band different prescaler (divider) set-
tings are possible.
Table 37 gives an example for the AM prescaler (divider) settings and the reception
frequencies.
e.g.,
f
VCO = 98.2 MHz ... 124 MHz
f
IF = 10.7 MHz
Note:
Prescaler VCO Divider = 1 in this example.
Table 37. AM Prescaler (Divider) Settings and Reception Frequencies
Divider (AM Prescaler)
Minimum Reception Frequency
[MHz]
Maximum Reception Frequency
[MHz]
divide by 2
38.4
51.3
divide by 3
20.033
30.633
divide by 4
13.85
20.3
divide by 5
8.94
14.1
divide by 6
5.667
9.967
divide by 7
3.329
7.014
divide by 8
1.575
4.8
divide by 9
0.211
3.078
divide by 10
0
1.7
f
rec
f
VCO
AM Prescaler
------------------------------------
f
IF
–
=
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