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參數資料
| 型號： | LA1784M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Single-Chip Tuner IC for Car Radios |
| 中文描述： | 單芯片調諧器IC的汽車收音機 |
| 文件頁數： | 41/50頁 |
| 文件大小： | 568K |
| 代理商： | LA1784M |
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No. 6039-41/50
LA1784M
+
32
A11769
(1) When there is no AC noise on pin 32
V
24
= V
27
–V
BE
↑
Q
MRC
V27 is about 2.5 V when the antenna input is 60 dB or higher.
(2) Since the MRC noise amplifier gain is fixed, the MRC circuit is adjusted by reducing the AC input level.
(3) The MRC attack and release are determined by C27 on pin 27.
Attack: 7 μA · C27
→
2 μA · C27
Release: 500
· C27
→
100
Notes on the Noise Canceler
The noise canceler characteristics have been improved by implementing the circuit that determines the gate time in
logic. Since the time constant in earlier noise cancelers was determined by an RC circuit such as that shown in figure
52, the rise time shown in figure 53 was influenced by the values of the resistor and capacitor used. As a result the
noise exclusion efficiency was reduced by this delay in the rise time. In the LA1784M, this rise time was shortened by
implementing the circuit that determines the gate time in logic, allowing it to reliably exclude noise.
Fig. 51
A11771
A11772
Fig. 52
Fig. 53
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| LA1787M | Single-Chip Tuner IC for Car Radios |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LA1787M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Tuner IC for Car Radios |
| LA1787M_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Tuner IC for Car Radios |
| LA1787M-MPB-E | 功能描述:調諧器 CAR RADIO TUNER RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數: 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| LA1787NM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Car Radio System IC |
| LA1787NM_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Car Radio System IC |
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