参数资料
型号: LA1781M
元件分类: 接收器
英文描述: AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
封装: 14 X 14 MM, QIP-64
文件页数: 17/48页
文件大小: 508K
代理商: LA1781M
LA1781M
No.6038-24/48
Notes on 3D AGC (Keyed AGC)
Fig. 8
The antenna damping current from the pin due to the pin diode flows when the V2 pin reaches the VCC - VBE level.
The narrow AGC operates as follows.
When pin V39
> pin V24 : The narrow AGC turns off.
When pin V39
< pin V24 : The narrow AGC turns on.
+
55
W-AGC
DET
58
1
2
39
24
N-AGC
DET
+
--
+
--
VCC
ANT
DUMPING
90
μA
S-meter
VS-meter
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