參數(shù)資料
型號(hào)： LA1780
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(yè)數(shù)： 24/38頁(yè)
文件大?。?/td> 764K
代理商： LA1780
MRC circuit
If there is no AC noise on pin 32:
V27 will be about 2.5 V for an antenna input of 60 dBμ or higher.
Since the MRC noise amplifier gain is fixed, the MRC circuit is adjusted by reducing the AC input level.
The MRC circuit attack and release times are determined by the capacitor C27 on pin 27.
Attack: 7 μA
×
C27
Release: 500
×
C27
5. FM Soft Muting
By comparing the pin 47 mute on adjustment voltage to the S-meter voltage (V24), the muting on point can be adjusted.
No. 5724-24/38
LA1780M
S-meter
FM
S-meter
To SNC
Pin 28
Noise amplifier
fc = The MPF + AMP 70 kHz
Required external transistor: 2SC536 or equivalent
Reason: Since the LA1780M MRC is a simplified
circuit, an OMRC level shifter is required.
V24 = V27 – V
BE
↑
Q
MRC
Smaller R
47
Larger R
47
Larger
R
47
Smaller R
47
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LA1780M 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Tuner IC for Car Radios
LA1780MA-A-MPB-E 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Trays 制造商:Rochester Electronics LLC 功能描述: 制造商:ON Semiconductor 功能描述:FTRAY - ANALOG CAR RADIO TUNER
LA1781M 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For Car Radios Single-Chip Tuner IC
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:
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