參數(shù)資料
型號(hào): TDA7326
廠商: STMICROELECTRONICS
元件分類(lèi): PLL合成/DDS/VCOs
英文描述: PLL FREQUENCY SYNTHESIZER, 140 MHz, PDIP16
封裝: DIP-16
文件頁(yè)數(shù): 14/16頁(yè)
文件大小: 1133K
代理商: TDA7326
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
12.5
01
25
10
1
11
2.5
TABLE 3.4
TDA7326
7/16
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