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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： | 8/19頁 |
| 文件大小： | 720K |
| 代理商： | LA1137N |
6.
Wideband AGC Sensitivity
The wideband AGC circuit two-signal sensitivity and shortwave interference suppression characteristics have been achieved by
reducing the sensitivity by approximately 10 dB from that of previous devices. If a FET with low gm and high IDSS is used, the
sensitivity can be increased by increasing the external sensitivity adjustment resistor (30 Ω). However, the voltage drop across this
resistor can cause the cascade AGC transistor to saturate. Therefore, if the sensitivity is to be increased by a large amount, a choke
coil should be added as shown in the figure below.
7.
The local oscillation level increased during LW (approx. 50°C or greater)
27 kΩ should be added between pins 19 and 23 for LA1136N, and between pins 15 and 19 for LA1137N. Not necessary for MW.
8.
Image Interference Reduction
Image interference in the alignment circuit can be reduced by up to 70 dB at fr = 1.4 MHz by injecting a 2.3 MHz trap signal into
the primary coil. Note that this technique reduces the sensitivities at frequencies above 1.4 MHz.
9.
Upgraded Features of LA1136 and LA1137 to LA1136N and LA1137N
Upgraded features
LA1136, LA1137 LA1136N, LA1137N
IF count buffer output voltage
74 dB, zero modulation,
fr = 1 MHz when STOP RQ=0V
Test circuit LA1137N
80 mVp-p
1.5 mVp-p
Signal detector output voltage
when VCC OFF
Test circuit LA1137N
0.7 V
5 V
Unit (resistance: Ω, capacitance: F)
LA1136N, 1136NM, 1137N, 1137NM
No. 3507-16/28
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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