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參數資料
| 型號： | LA1137N |
| 元件分類： | 接收器 |
| 英文描述： | AM, AUDIO SINGLE CHIP RECEIVER, PDIP20 |
| 封裝： | SDIP-20 |
| 文件頁數： | 5/19頁 |
| 文件大小： | 720K |
| 代理商： | LA1137N |
(2) Oscillator coil
The oscillator for LA1136N and LA1137N can operate up to 100 MHz. Stray capacitance resulting from poor oscillator coil
design can cause antiresonance in the range 50 to 100 MHz. This results inparasitic oscillations at the local-oscillator buffer
output, which can prevent the PLL from locking.
Countermeasure
1 Reduce the oscillator coil stray capacitance (tapping is recommended)
2 Connect a capacitor of 43 pF or greater between OSC BUFF (Pin 24 for LA1136N, and Pin 20 for LA1137N) and GND.
(3) IF tank coil
LA1136N Pin 13 load coil
LA1137N Pin 10 load coil
The IF tank coil connected to IF OUT has different specifications to that of the LA1135. The detector input impedance of the
LA1135 is low, therefore for a QO of 70 to 80, the QL was 20 to 30. The detector input impedances of the LA1136N and
LA1137N are higher. This means that the QO and QL of the tank coil are approximately the same. A coil with a QO of
approximately 30 is recommended.
4.
Recommended Coil Specifications
(1) RF alignment coil
Parasitic oscillations in the 50 to
100 MHz region
Required local
oscillator signal
Primary coil
Secondary coil
LA1136N, 1136NM, 1137N, 1137NM
No. 3507-13/28
相關PDF資料 |
PDF描述 |
|---|---|
| LA1136NM | AM, AUDIO SINGLE CHIP RECEIVER, PDSO24 |
| LA1136N | AM, AUDIO SINGLE CHIP RECEIVER, PDIP24 |
| LA1143 | FM, AUDIO DEMODULATOR, PDIP16 |
| LA1145M | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| LA1145 | SPECIALTY CONSUMER CIRCUIT, PZIP18 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LA1137NM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:AM Tuners for Car Radios and Home Stereos |
| LA1140 | 制造商:Panasonic Industrial Company 功能描述:IC |
| LA1140_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:FM IF SYSTEM FOR CAR RADIO |
| LA1140B-E | 制造商:ON Semiconductor 功能描述:CAR RADIO FM IF SYSTEM - Ammo Pack |
| LA1140-E | 功能描述:射頻接收器 CAR RADIO FM IF SYSTEM RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
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