參數(shù)資料
型號: LA1781M
廠商: Sanyo Electric Co.,Ltd.
英文描述: Single-Chip Tuner IC for Car Radios
中文描述: 單芯片調(diào)諧器IC的汽車收音機(jī)
文件頁數(shù): 28/50頁
文件大?。?/td> 567K
代理商: LA1781M
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.
No. 6038-28/50
LA1781M
S-meter
FM IF
HOLE
CLET
Muting
drive
output
STEREO
IND
Band
muting
39
24
33
23
26
+
+
+
4.9V
R
R
R
IF count buffer
IF count output
2.5V 5V
SD
STEREO/MONO
5V
A11759
V23DC
V23AC
V26
5 V
V33
V38
V24
Larger
values
of R33
Smaller values of R33
S-meter
V33
over 0.7 V
V33
over 0.7 V
On as an
SD signal
SD
ON
SD
ON
Stereo
Mono
0.7 V
OFF
OFF
IF count
buffer
5 V
2.5 V
0 V
IF counter output off
RDS and other types of SD detection can be used by switching these modes.
A11758
New LA1781M functionality: For stereo input (when the V26 pin voltage is 0.7 V),
when this pin is shorted to ground (0.1 V or lower)
the IC will operate in forced mono mode.
Fig. 13
Fig. 14
Figure 14 shows the relationship between the FM SD, the IF count buffer output, the S-meter, and the muting drive
output.
相關(guān)PDF資料
PDF描述
LA1784 Single-Chip Tuner IC for Car Radios
LA1784M Single-Chip Tuner IC for Car Radios
LA1787M Single-Chip Tuner IC for Car Radios
LA17 10 TO 1000 MHz TO-8 CASCADABLE LIMITING AMPLIFIER
LA1800 FM/AM Single-Chip Radio
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: