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參數資料
型號: LA1780M
元件分類: 調諧器
英文描述: 2-BAND, AUDIO TUNER, PQFP64
封裝: QFP-64
文件頁數: 16/38頁
文件大小: 764K
代理商: LA1780M
Notes on the muting attenuation
The resistor between pin 58 and ground switches the muting attenuation to one of three levels, –20, –30, and –40 dB.
This is also related to the tuner’s total gain.
No. 5724-23/38
LA1780M
R
Mute ATT
OPEN
–20 dB
200k
–30 dB
30k
–40 dB
If R33 is reduced, the attenuation will be
reduced as listed in the table above.
Muting time constants
Attack: 10 k
× C33
Release: 50 k
× C33
Quadrature detector
Limiter
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