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| 型號(hào)： | TDA7406T |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, TQFP-44 |
| 文件頁數(shù)： | 21/49頁 |
| 文件大?。?/td> | 830K |
| 代理商： | TDA7406T |
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TDA7406T
28/49
The stereodecoder-part of the TDA7406T (see Fig. 25) contains all functions necessary to demodulate the
MPX-signal like pilot tone-dependent MONO/STEREO-switching as well as “stereoblend” and “highcut”. Adap-
tations like programmable input gain, roll-off compensation, selectable de-emphasis time constant and a pro-
grammable field strength input allow to use different IF-devices.
4.1 Stereodecoder-Mute
The TDA7406T has a fast and easy to control RDS-Mute function which is a combination of the audioproces-
sor's SoftMute and the high-ohmic mute of the stereodecoder. If the stereodecoder is selected and a SoftMute
command is sent (or activated through the SM-pin) the stereodecoder will be set automatically to the high-ohmic
mute condition after the audio-signal has been soft muted. Hence a checking of alternate frequencies could be
performed. Additionally the PLL can be set to “Hold”-mode, which disables the PLL input during the mute time.
To release the system from the mute condition simply the unmute-command must be sent: the stereodecoder
is unmuted immediately and the audioprocessor is softly unmuted. Fig. 26 shows the output-signal VO as well
as the internal stereodecoder mute signal. This influence of SoftMute on the stereodecoder mute can be
switched off by setting bit 3 of the SoftMute byte to “0”. A stereodecoder mute command (bit 0, stereodecoder
byte set to “1”) will set the stereodecoder in any case independently to the high-ohmic mute state.
If any other source than the stereodecoder is selected the decoder remains muted and the MPX-pin is connect-
ed to Vref to avoid any discharge of the coupling capacitor through leakage currents. No further mute command
should be applied.
Figure 22. Signals during stereodecoder's SoftMute
Figure 23. Signal-Control via SoftMute-Pin
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7406TR | 功能描述:音頻 DSP INFOTAINMENT SIGNAL RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7407 | 功能描述:音頻 DSP Advanced car signal processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7407_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Advanced car signal processor |
| TDA7407D | 功能描述:音頻 DSP INFOTAINMENT SIGNAL RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7407DTR | 功能描述:IC PROCESSOR ADV SIGNAL 44-LQFP RoHS:是 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 |
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