參數(shù)資料
型號: LA17000M
元件分類: 接收器
英文描述: AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP80
封裝: 14 X 14 MM, QFP-80
文件頁數(shù): 41/54頁
文件大?。?/td> 830K
代理商: LA17000M
LA17000M
No. 6522-46/54
(7) MRC circuit
1) When there is no AC noise on pin 48
V42 = V43–VBE
QMRC
V43 is approximately 2.5 V when ANT input is 60 dB
or higher.
2) Because the MRC noise amplifier gain is fixed, adjust MRC by reducing the AC input level.
3) The MRC attack and release are determined by C43 on pin 43.
Attack 7
A C27
Release 500
C27
(8) FM soft mute
The stereo blend curve can be adjusted
through the R28 external resistor.
S-meter
FM
S-meter
Compare the pin 63 MUTE ON adjusting voltage and the V42 S-meter voltage, and adjust the MUTE ON point.
R63 larger
R63 smaller
R63 larger
R63 smaller
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