參數(shù)資料
型號(hào)： TDA7705
廠商： STMICROELECTRONICS
元件分類(lèi)： 接收器
英文描述： AUDIO/VIDEO DEMODULATOR, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-64
文件頁(yè)數(shù)： 3/42頁(yè)
文件大小： 396K
代理商： TDA7705
TDA7705
Function description
Doc ID 15938 Rev 8
2.6
IF A/D converters
A high performance IQ-IFADC converts the IF-signal to digital IF for subsequent digital
signal processing.
2.7
Audio D/A converters
A stereo DAC provides the left / right audio signals after IF-processing and stereodecoding
by the DSP.
2.8
VCO
The VCO is fully integrated without any external tuning component. It covers all FM
frequency bands including EU, US , Japan, EastEU, Weatherband and AM-bands including
LW, MW, SW.
2.9
PLL
The high speed tuning PLL is able to settle within about 300 s for fast RDS applications.
The frequency step can be as low as 5 kHz in FM and 500 Hz in AM.
2.10
Crystal oscillator
The device works with a 37.05 MHz fundamental tone crystal, and can be used also with a
3rd overtone 37.05 MHz crystal.
2.11
DSP
The DSP and its hardware accelerators perform all the digital signal processing. The main
program is fixed in ROM. Control parameters are copied in RAM and are accessible and
modifiable there, thus allowing parametric performance optimization.
It performs:
●
digital down-conversion of IF
●
bandwidth selection with variable controlled bandwidth
●
FM and AM noiseblanking
●
FM/AM demodulation with softmute, high-cut, weak signal processing and quality
detection
●
FM stereo decoding with stereo blend
●
RDS demodulation including error correction and block synchronization with generation
of an RDS interrupt for the main P
●
Autonomous control of RDS-AF tests
●
Self alignment of preselection tuning
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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