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參數(shù)資料
| 型號(hào)： | TDA7411 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, 1.40 MM HEIGHT, TQFP-44 |
| 文件頁數(shù)： | 21/43頁 |
| 文件大?。?/td> | 617K |
| 代理商： | TDA7411 |
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TDA7411
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Figure 23. Block Diagram of Multi path Detector
Programming
To obtain a good multipath performance an adaptation is necessary. Therefore the gain of the 19kHz-
bandpass is programmable in four steps as well as the rectifier gain. The attack- and decay-times can be
set by the external capacitor value.
Quality Detector
The A673 offers a quality detector output, which gives a voltage representing the FM-reception conditions.
To calculate this voltage the MPX-noise and the multipath-detector output are summed according to the
following formula:
VQual = 1.6 (VNoise-0.8 V)+ a (REF5V-VMpout).
The noise-signal is the PEAK-signal without additional influences (see noise blanker description). The fac-
tor 'a' can by programmed from 0.6 to 1.05. The output is a low impedance output able to drive external
circuitry as well as simply fed to an AD-converter for RDS applications.
AF Search Control
The TDA7411 is supplied with several functionality to support AF-checks using the stereo decoder. As
mentioned already before the high impedance mute feature avoids any clicks during the jump condition.
It is possible at the same time to evaluate the noise- and multipath-content of the alternate frequency by
using the Quality detector output. Therefore the multipath-detector is switched automatically to a small
time-constant.
One additional pin (AFS) is implemented in order to separate the audio processor-mute and stereo decod-
er AF-functions. In Figure 24 the block diagram and control-functions of the complete AFS-functionality is
shown (please not the pins FAS and SM are active low as well as all control-bits indicated by an over bar).
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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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| TDA7411TR | 功能描述:IC PROCESSOR CAR SIGNAL 44TQFP RoHS:否 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關(guān)文件:STA321 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應(yīng)用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
| TDA7412 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CARRADIO SIGNAL PROCESSOR |
| TDA7415 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| TDA7415CB | 功能描述:音頻放大器 Car-radio Multimedia Signal (CMSP) 6-chnl RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7415CBTR | 功能描述:音頻放大器 Car-radio Multimedia Signal (CMSP) 6-chnl RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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