參數(shù)資料
型號： LA1780M
元件分類： 調(diào)諧器
英文描述： 2-BAND, AUDIO TUNER, PQFP64
封裝： QFP-64
文件頁數(shù)： 22/38頁
文件大?。?/td> 764K
代理商： LA1780M
AM AGC System
The LA1780M RF AGC is picked up from three locations.
The wide AGC determined by Rw
The middle AGC picked up from the pin 49 second mixer input
The operating bandwidth is 150 kHz to 180 kHz (the bandwidth of the 10.7 MHz CF)
The narrow AGC picked up from pin 52
The operating bandwidth is 7 kHz (the bandwidth of the 450 kHz CF)
No. 5724-29/38
LA1780M
AM AGC Frequency Characteristics
AGC
on
level
Frequency, — Hz
Wide AGC
Operates for wide-band
interfering stations.
Wide AGC
Operates for wide-band
interfering stations.
Middle AGC
Operates for interfering
stations that are
±70 kHz from the
received frequency.
Middle AGC
Operates for interfering
stations that are ±70
kHz from the received
frequency.
Narrow AGC
Operates at the
received frequency.
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