- 您現在的位置：買賣IC網 > PDF目錄39187 > LA75675M FM, VIDEO DISCRIMINATOR, PDSO24 PDF資料下載
參數資料
| 型號： | LA75675M |
| 元件分類： | 接收器 |
| 英文描述： | FM, VIDEO DISCRIMINATOR, PDSO24 |
| 封裝： | 0.300 INCH, SO-24 |
| 文件頁數： | 8/9頁 |
| 文件大?。?/td> | 211K |
| 代理商： | LA75675M |
LA75675M
No.A0249-8/9
V23. V24. APC pull-in range [fpu, fpl]
(1) Internal AGC
(2) fp = 39MHz to 51MHz CW; 10mVrms
(3) Adjust the SG signal frequency to be higher than fp = 45.75MHz to bring the PLL to unlocked state.
Note : The PLL is assumed to be in unlocked state when a beat signal appears at test point A.
(4) When the SG signal frequency is lowered, the PLL is brought to locked state again. f1
(5) Lower the SG signal frequency to bring the PLL to unlock state.
(6) When the SG signal frequency is raised, the PLL is brought to locked state again. f2
(7) Calculate as follows :
fpu = f1 – 45.75MHz
fpl = f2 – 45.75MHz
V25. AFT tolerance frequency 1 [
Fa1]
(1) Internal AGC
(2) SG1 : 43.75MHz to 47.75MHz variable CW 10mVrmns
(3) Adjust the SG1 signal frequency so that the AFT output DC voltage (test point B) becomes 2.5V;
that SG1 signal frequency is f1.
(4) External AGC (Adjust the V17.)
(5) Apply 9V to the IFAGC (pin 17) and then pick up the VCO oscillation frequency from the GND, etc.;
that frequency is f2.
(6) Calculate as follows :
AFT tolerance frequency :
Fa1 = f2 – f1 (kHz)
V26. V27. VCO maximum variable range (U, L) [dfu, dfl]
(1) Apply the VCC voltage to the external AGC, IF AGC (pin 17).
(2) Pick up the VCO oscillation frequency from the VIDEO output (A), GND, etc.
and adjust the VCO coil so that the frequency becomes 45.75MHz.
(3) fl is taken as the frequency when 1V is applied to the APC pin (pin 9).
In the same manner, fu is taken as the frequency when 5V is applied to the APC pin (pin 9).
dpu = fu – 45.75MHz
dfl = fl – 45.75MHz
V28. VCO control sensitivity [
β]
(1) Apply the VCC voltage to the external AGC, IF AGC (pin 17).
(2) Pick up the VCO oscillation frequency from the VIDEO output (A), GND, etc.
and adjust the VCO coil so that the frequency becomes 45.75MHz.
(3) f1 is taken as the frequency when 3.0V is applied to the APC pin (pin 9).
In the same manner, f2 is taken as the frequency when 3.4V is applied to the APC pin (pin 9).
β =
(kHz/mV)
S1. SIF Limiting sensitivity [Vi (lim)]
(1) Apply the VCC voltage to the external AGC, IF AGC (pin 17).
(2) fs = 4.5MHz fm = 400Hz
F = ±25kHz (SIF input)
(3) Set the SIF input level to 100mVrms and then measure the level at test point D. V1
(4) Lower the SIF input level until V1
3dB occurs. Measure the input level at that moment.
S2. S4. FM detection output voltage, distortion [Vo (FM), THD]
(1) Apply the VCC voltage to the external AGC, IF AGC (pin 17).
(2) fs = 4.5MHz fm = 400Hz
F = ±25kHz (SIF input Vi = 100mVrms)
(3) Assign the level at test point D to the FM detection output voltage and measure the distortion factor.
f2–f1
400
相關PDF資料 |
PDF描述 |
|---|---|
| LA76850 | SPECIALTY CONSUMER CIRCUIT, PDIP36 |
| LA76850 | SPECIALTY CONSUMER CIRCUIT, PDIP36 |
| LA7795T | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| LA7806 | HORIZ/VERT DEFLECTION IC, PDIP16 |
| LA7857 | HORIZ/VERT DEFLECTION IC, PDIP22 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LA75675M-S | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:VIF/SIF IF Signal-Processing Circuit that Supports NTSC Intercarrier for TV and VCR Products |
| LA75676M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For TV and VCR Products IF Signal Processor (VIF+SIF) |
| LA75676V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For TV and VCR Products IF Signal Processor (VIF+SIF) |
| LA75676V_07 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For TV and VCR Products IF Signal Processor (VIF+SIF) |
| LA75676VA | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:IF Signal Processor (VIF+SIF) for TV and VCR Products |
發(fā)布緊急采購，3分鐘左右您將得到回復。