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參數(shù)資料
| 型號(hào)： | LA3430 |
| 元件分類： | 接收器 |
| 英文描述： | FM, AUDIO DEMODULATOR, PZIP16 |
| 封裝： | 3 MM PITCH, SIP-16 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大小： | 336K |
| 代理商： | LA3430 |
LA3430
No. 1408-6/13
Cautions when employing sample application circuits
Adjust separation by 10kΩ potentiometer in low pass filter.
Adjust RS for noise detection sensitivity under strong to medium radio fields. Set at adequate value.
Adjust noise AGC by CY and RY to enhance noise suppression in medium to weak radio fields.
Adjust pilot cancellation by 50kΩ potentiometer connected to pin 15 of LA2110.
Reponse speeds of pilot cancellation to follow levels can be varied by adjusting capacitance value of 1μF capacitor
connected across pins 11 and 12 of LA3430. Distortion factors deteriorate with reduction in value.
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 LA2110. Set their ranges for V : 200mV/div. AC, H : 20
μs/
div.
When oscilloscope waveform is
or
turn pilot cancel control to change it to the following.
Then, adjust pilot cancel control to minimize indications of valve voltmeter.
When the LA3430 alone is used (sample application circuit 1), adjust cancel control through a 19kHz B.P.F. to
minimize carrier leakage level at output pins (pins 5 and 6).
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
amplitude to pilot level with C and R.
2. Separation adjustments
The LA3430 has separation parameters that have been set to provide maximum separation when used in conjunction
with the LA2110, a noise-canceler IC, or the equivalent. The LA3430 by itself exhibits separation only in a 25 to
30dB range. If a phase correction circuit is provided in the LA3430 input circuit, it can exhibit intrinsic separation
characteristics, typically 50dB.
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相關(guān)代理商/技術(shù)參數(shù) |
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| LA3430M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL FM MPX Stereo Demodulator with Pilot Canceler For Car Stereo Use |
| LA3430M-UDEL-AE | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LA3433 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Car Stereo-Use PLL FM MPX Stereo Demodulator with Pilot Canceler |
| LA3440 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC |
| LA3450 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL FM MPX Stereo Demodulator with Adjustment-Free VCO And Measure Against Channel Interference |
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