參數(shù)資料
型號: LA1781M
元件分類: 接收器
英文描述: AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
封裝: 14 X 14 MM, QIP-64
文件頁數(shù): 20/48頁
文件大小: 508K
代理商: LA1781M
LA1781M
No.6038-27/48
5. FM IF
Notes on the FM SD and SD adjustment
The figure below presents an overview of the FM SD and the IF count buffer.
Fig. 13
Figure 14 shows the relationship between the FM SD, the IF count buffer output, the S-meter, and the muting drive
output.
Fig. 14
S-meter
FM IF
HOLE
CLET
Muting
drive
output
STEREO
IND
Band
muting
39
24
33
23
26
+
--
+
--
+
--
4.9V
R
IF count buffer
IF count output
2.5V 5V
SD
STEREO/MONO
5V
V23DC
V23AC
V26
V33
V38
V24
5V
Larger
values
of R33
Smaller values of R33
S-meter
V33
over 0.7V
V33
over 0.7V
On as an
SD signal
SD
ON
SD
ON
Stereo
Mono
0.7V
OFF
IF count
buffer
5V
2.5V
0V
IF counter output off
RDS and other types of SD detection can be used by switching these modes.
New LA1784M functionality : For stereo input (when the V26 pin voltage is 0.7V),
when this pin is shorted to ground (0.1V or lower)
the IC will operate in forced mono mode.
相關(guān)PDF資料
PDF描述
LA1784M AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
LA1787NM AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
LA1787NM AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64
LA1800 AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP22
LA1805 AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LA1781M_09 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Car Radios Single-Chip Tuner IC
LA1781MA-MPB-E 功能描述:調(diào)諧器 RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度:
LA1781MD-A-MPB-E 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Trays
LA1781MD-B-MPB-E 功能描述:調(diào)諧器 RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度:
LA1781ML-MPB-E 功能描述:調(diào)諧器 RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: