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參數資料
| 型號： | TUA4307 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP80 |
| 封裝： | MQFP-80 |
| 文件頁數： | 16/48頁 |
| 文件大小： | 952K |
| 代理商： | TUA4307 |
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Functional Description
3 - 15
TUA 4307
Wireless Components
Specification, September 1999
3.3 Circuit Description
3.3.1
AM/FM-Receiver
The AM/FM-receiver part includes a 2-pin varactor tuned oscillator. In the FM
mode the direct oscillator frequency is fed into the double balanced FM mixer,
in the AM mode the divided by 4, 6, 8 or 10 oscillator frequency is fed into the
AM mixer.
The two separate symmetrical input stages of the IC, one optimized for FM-, the
other for AM- mode allow symmetrical and unsymmetrical prestage configura-
tion.
The AM and FM input frequencies are converted to a fix 1st IF in the 10.7 MHz
range. The FM-IF is post amplified in a separate IF amplifier with DC adjustable
gain, the AM-IF is fed directly to the 2nd mixer.
The TUA 4307 has been designed to work with a PLL in the 100MHz range in
both modes or in the AM- mode with the divided frequency.
Depending on the input signal strength, the integrated AGC stage for prestage
control drives PIN-Diodes as well as MOSFETs.
3.3.2
FM-MODE
FM-IF Demodulator
The FM-IF amplifier includes a 7 stage capacitive coupled limiter amplifier with
coincidence demodulator and AF output. The AF output signal can be continu-
ously attenuated to decrease the noise.
There is a field strength output (with min. 76 dB dynamic range, typ. ±1 dB non-
linearity and typ. ±3 dB temperature drift) and a soft mute function with adjust-
able mute depth (with full muting typ 80 dB).
An IF counter output with request function and a station detector with S curve
criterion and adjustable fieldstrength threshold are available
A multipath detector with analog output is available. Its input signal is fed from
the high pass filter of the stereo-decoder/noiseblanker and a second 80 kHz
1-pole high pass filter.
3.3.3
Stereodecoder
Power supply, reference current:
A temperature-stable, low noise reference voltage generator is used for better
ripple rejection and to generate a reference current. This current is used as a
time base for the deemphasis, the gate time of the pulse former, and the pilot
cancellation, avoiding temperature and tolerance effects.
MPX input, MPX filter:
A 4-pole low-pass filter determines the bandwidth of the MPX signal.
相關PDF資料 |
PDF描述 |
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| TUA4310XS | 1-BAND, AUDIO TUNER, PDSO20 |
| TUA4401K | FM, AUDIO SINGLE CHIP RECEIVER, PQFP44 |
| TUA4401 | FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| TUA6010XS | 2-BAND, VIDEO TUNER, PDSO28 |
| TUA6010XS | VIDEO TUNER, PDSO28 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TUA4401 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FM Receiver Circuit |
| 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 |
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