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參數資料
| 型號： | TUA4401 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 接收器 |
| 英文描述： | FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 文件頁數： | 3/36頁 |
| 文件大小： | 1129K |
| 代理商： | TUA4401 |
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TUA 4401
CAR RADIO
Wireless Products
14.06.99
PAGE: 10
Demoboard:
The demoboard contains the single chip receiver TUA 4401. This Integrated
Circuit is designed using the latest BICMOS technology. The IC includes RF, IF,
and PLL sections along with severed internal voltage and current supplies.
Surrounding the IC are the external RF stage for FM, the local oscillator, the IF
filtering parts, and input and output matching for the different signals and control
possibilities.
RF section
The FM input prestage amplifier uses the Siemens MOSFET tetrode BF1009
with internal fixed DC bias. Both gate 2 and the pin diode at the antenna input
are controlled via the IC to limit the maximum RF input level at the FM mixer
input. The RF circuit between the drain of the MOSFET and the mixer input is
designed as a tracking circuit to provide image frequency rejection and suppress
local oscillator radiation.
The AGC threshold has an internally controlled AGC starting point from Vin = 15
to 60 mVrms at the mixer input. The AGC time constant is given with
I * t = C *
U.
I
IC internal reference current I = 50 A
t
time constant
C
load capacity at pin 30
U AGC voltage range at pin 30.
The local oscillator operates in the 100 MHz range.
The parameter for the RF / LOC OSC adjustment is the signal strength level. At
the input frequency of 88 MHz the LOC OSC tuning voltage VTUN is set to 2.6 V
with L04. The prestage coils L01 and L03 have to be adjusted to maximum
signal strength. At 106 MHz maximal signal strength is set with P01.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TUA4401K | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:FM Car Radio IC with PLL |
| TUA6010 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Wireless Components |
| TUA6010X | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF Mixer |
| TUA6010XS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TUA6012 | 制造商:SIEMENS 制造商全稱:Siemens Semiconductor Group 功能描述:Components for Entertainment Electronics |
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