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參數(shù)資料
| 型號(hào)： | S1T3361D01-S0B0 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | LOW VOLTAGE/POWER NARROW BAND FM IF |
| 中文描述： | 低電壓/功率窄帶調(diào)頻中頻 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大小： | 130K |
| 代理商： | S1T3361D01-S0B0 |
LOW VOLTAGE/POWER NARROW BAND FM IF
S1T3361D
5
APPLICATION CIRCUIT
In the above application circuit, the audio signal is recovered using a conventional quadrature FM detector.
The absence of an input signal is indicated by the presence of noise above the desired audio frequencies. This
“
noise band
”
is monitored by an active filter and a detector. A squelch trigger circuit indicates the presence of
noise (or a tone) by an output which can be used to control scanning. At the same time, an internal switch is
operated which can be used to mute the audio.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Mixer input
10.7MHz
10nF
51
Audio
Mute
Scan
Control
10k
Squelch
1.0uF
Filter
Amp out
470k
510k
1.0uF
Filter
Amp in
Audio
output
10nF
8.2k
20k
Quad coil
0.1uF
0.1uF
0.1uF
455MHz
Filter
68pF
220pF
Vcc
10.24MHz
OSC
OSC MIXOUT VCC
LIMIN DECOLPLING
QUAD
S1T3361D
AUDIO
FIN
FOUT
SQ
SCAN
MUTE
GND
MIXIN
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