- 您現在的位置：買賣IC網 > PDF目錄30725 > LA7577N FM, AUDIO SINGLE CHIP RECEIVER, PDIP24 PDF資料下載
參數資料
| 型號： | LA7577N |
| 元件分類： | 接收器 |
| 英文描述： | FM, AUDIO SINGLE CHIP RECEIVER, PDIP24 |
| 封裝： | DIP-24 |
| 文件頁數： | 4/16頁 |
| 文件大小： | 354K |
| 代理商： | LA7577N |
LA7577N
No. 4037—12/16
VCO Tank (Pins 15 and 16)
The VCO tank circuit is shown in Figure 21. The tank cir-
cuit capacitors connected between pins 15 and 16 should
be in the range 20 to 27pF (24pF is recommended). The
VCO tank susceptibility to external effects can be reduced
by using either chip capacitors or capacitors integrated
with the tank coil.
Figure 20. AFT output
Figure 21. VCO tank
Composite Video Output (Pin 17)
The 4.5MHz composite video output circuit is shown in
Figure 22. A resistor should be connected between this
emitter-follower output and ground to ensure adequate
output drive capability. The resistor should be
≥1.2kΩ
(VCC = 12V), or ≥1kΩ (VCC = 9V).
APC Filter (Pin 18)
Time-constant switching is incorporated into the VCO for
automatic phase control (APC). When the PLL is locked,
the VCO is controlled by loop A, shown in Figure 23.
When the PLL is unlocked or the signal is weak, the VCO
is controlled by loop B which has higher gain. The
increased APC loop gain also increases the pull-in range.
The recommended range for the external APC lter resis-
tor is 47 to 150
Ω, and for the capacitor, 0.47μF.
Figure 22. Composite video output
Figure 23. APC lter
相關PDF資料 |
PDF描述 |
|---|---|
| LA7577 | SPECIALTY CONSUMER CIRCUIT, PDIP24 |
| LA7578N | FM, AUDIO/VIDEO DEMODULATOR, PDIP24 |
| LA7583 | AUDIO/VIDEO DEMODULATOR, PDIP24 |
| LA7605M | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| LA76070 | SPECIALTY CONSUMER CIRCUIT, PDIP52 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LA7578 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA7578N | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:IF Signal Processing (Super PLL-II VIF + SIF) Circuit for TVs and VCRs |
| LA7583 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:IF Signal Processing Circuit (A2C PLL VIF + SIF) for TVs and VCRs |
| LA7590 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| LA7600 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
發布緊急采購，3分鐘左右您將得到回復。