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參數(shù)資料
| 型號： | LA3375 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Pilot Cancel-Provided PLL FM MPX Demodulator for Car Stereos(用于汽車立體聲PLL FM MPX解調(diào)器) |
| 中文描述： | 試點取消提供的汽車音響（用于汽車立體聲調(diào)頻盈豐鎖相環(huán)解調(diào)器解調(diào)器鎖相環(huán)調(diào)頻盈豐） |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 287K |
| 代理商： | LA3375 |
LA3375
No.901–4/11
Cautions when employing sample application circuits
1) Adjust separation by 10k
potentiometer in low pass filter.
2) Adjust R
S
for noise detection sensitivity under strong to medium radio fields. Set at appropriate value.
3) Adjust noise AGC by C
Y
and R
Y
to enhance noise suppression in medium to weak radio fields.
4) Adjust pilot cancellation by 50k
potentiometer connected to pin 15 of LA2110.
5) Reponse speeds of pilot cancellation to follow levels can be varied by adjusting capacitance value of 1
μ
F capacitor
connected across pins 11 and 12 of LA3375. Distortion factors deteriorate with reduction in value.
6) Adjusting pilot cancellation.
For example consider the sample application circuit 2. Assume the input signal consists only of pilot signals. First
connect an oscilloscope and a valve voltmeter to pin 2 of the LA2110. Set their ranges for V : 200mV/div. AC, H :
20
μ
s/div.
When oscilloscope waveform is
turn pilot cancel control to change it to the following :
Then, adjust pilot cancel control to minimize indications of valve voltmeter.
When the LA3375 alone is used (sample application circuit 1), adjust cancel control through a 19kHz BPF to
minimize carrier leakage level at output pins (pins 5 and 6).
*Refer to the LA2110 catalog for LA3375/LA2110 applications and characteristics.
1. Pilot cancelling circuit
A level-following type has been used. Once set, it can easily accommodate varying pilot modulation depths among
stations. Cancelling signal is a sawtooth wave obtained by integrating a square wave that is proportionate in ampli-
tude to pilot level with C and R.
2. Separation adjustments
The LA3375 has separation parameters that have been set to provide maximum separation when used in conjunction
with the LA2210, a noise-canceler IC, or the equivalent. The LA3375 by itself exhibits separation only in a 25 to 30
dB range. If a phase correction circuit is provided in the LA3375 input circuit, it can exhibit intrinsic separation
charactersitics, typically 50 dB.
3. Adjusting the free running frequency
Use a timing set resistor and a semi-set resistor, when connecting a frequency counter. Connect the counter with a
high impedance input to the connection between these resistors with a 100-k
resistor, as shown below.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA3376 | Pilot Cancel-Provided PLL FM MPX Demodulator for Car Stereos(用于汽車立體聲PLL FM MPX解調(diào)器) |
| LA3380 | PLL FM |
| LA3386-MQ | TRANS PREBIASED NPN 150MW SOT523 |
| LA3386-Q | Hyper 3 mm T1 LED, Diffused Hyper-Bright, Wide-Angle LED |
| LA3386-P | Hyper 3 mm T1 LED, Diffused Hyper-Bright, Wide-Angle LED |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA3376 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Pilot Cancel-Provided PLL FM MPX Demodulator for Car Stereos |
| LA3376M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| LA3380 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL FM |
| LA3381 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA3386 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Hyper 3MM (T1) LED/Diffused Hyper-Bright/Wide-A |
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