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參數(shù)資料
| 型號： | LA1260 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | FM/AM Tuner System for Radio-Casette Recorders, Music Centers |
| 中文描述： | 調(diào)頻/調(diào)幅調(diào)諧器系統(tǒng)的無線電Casette錄像機，音樂中心 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大?。?/td> | 924K |
| 代理商： | LA1260 |
LA1260
No.1506-3/14
Unit (resistance :
, capacitance : F)
T1 Mitsumi YT30194 (56pF tuning)
T2 Mitsumi KW30011
T3 Mitsumi YT30105
T4 Mitsumi YT30112
Proper Cares in Using the IC
External parts placement and pattern
The AM local oscillation parts, AM local oscillation coil, and antenna circuit parts such as bar antenna must be
separated from each other as far as possible to prevent Qs from worsening.
Pin 16 (AM oscillation injection pin) and pin 14 (RF input pin) must be separated from each other on the pattern as
shown in Figure. A below. Care should be taken not to make unwanted coupling by parallel wiring as shown in
Figure B to prevent Qs from worsening.
FM quadrature detection coil
The values recommended for the detection coil are shown below. (See Figure 1.)
Tuning capacitance
Damping resistance : 6.8k
Values other than recommended provide the LED drive characteristic as shown below.
: 56pF
Figure A Good example
Figure B Bad example
Value increased
Lighting is delayed.
No lighting may occur at low
temperature.
Lighting is advanced.
Mislighting may occur in the
absence of signal.
Value decreased
Lighting is advanced.
Mislighting may occur in the
absence of signal.
Lighting is delayed.
No lighting may occur at low
temperature.
Tuning capacitance
Damping resistance
If the product of tuning capacitance and damping resistance is equal to that of values recommended above (e. g.
tuning capacitance=82pF, damping resistance=4.7k
), other characteristics (demodulation output, S/N, THD, etc.)
than the LED drive characteristic remain almost unaffected.
For applications where a double tuning coil is used, refer to "Applications where a double coil is used" on page 13.
Test Circuit
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