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TDA7326 データシート(PDF) 7 Page - STMicroelectronics

部品番号 TDA7326
部品情報  AM-FM RADIO FREQUENCY SYNTHESIZER
PDF  16 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7326 データシート(HTML) 7 Page - STMicroelectronics

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3.4 REFERENCE FREQUENCY GENERATOR
The crystal oscillator clock is divided by the
reference frequency divider to provide the ref-
erence frequency to the phase comparator.
Reference frequency divider range is select-
able by the programming bit ’fREF’.
Available reference frequency are shown in
following table.
PREDIVIDER
R
OSC IN
REGISTER
PC7 .. PC0
COUNTER : C
AM IN
FM IN
REGISTER
SC5 .. SC0
PD
fref
fsyn
D94AU102
MSB
Figure 3: AM direct mode operation for SW, MW and LW
Figure 4: Phase comparator
AM/FM
fREF
fREF (kHz)
0
0
12.5
01
25
10
1
1
1
2.5
TABLE 3.4
TDA7326
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