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參數(shù)資料
| 型號(hào)： | TA2159F |
| 廠商： | Toshiba Corporation |
| 英文描述： | TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic |
| 中文描述： | 東芝雙極線性集成電路硅單片 |
| 文件頁(yè)數(shù)： | 12/28頁(yè) |
| 文件大?。?/td> | 378K |
| 代理商： | TA2159F |
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TA2159F
2002-10-03
12
Application Note
1. FM detection circuit
For the FM detection circuit, detection coil is able to use instead of ceramic discriminator. Recommended
circuit and recommended coil are as follows.
Turns
Test
Frequency
Co
(pF)
Qo
1-2
2-3
1-3
4-6
Wire
(mm )
Reference
10.7 MHz
51
45
30
0.08UEW
TOKO Co., Ltd.
600BEAS-10018Z
2. Forced manual switch
Forced manual switchover is done by pin 47
As the figure below shows, when the electronic switch uses a transistor, keep V
CE
(sat, saturated
voltage between the collector and emitter) up to 0.2 V. At this time, if the voltage on pin 47 exceeds 0.2 V
or the current from the pin drops below 30 A (V
CC
3 V typ.), Forced Monaural may not be set.
3. V
CC
line
The tuner have two voltage supply terminals, V
CC
(for AM, FM IF, MPX stage) and RF V
CC
(for FM RF
stage). Set up the potential diffrence between V
CC
and RF V
CC
0.4 V (typ.) or less, otherwise there is the
case that this IC doesn’t oprete normally.
V
CE (sat)
47
V
CC
3
1
2
4
6
V
CC
Pin 43
43
1
V
CC
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