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參數(shù)資料
| 型號： | TDA7406 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Car radio signal processor |
| 中文描述： | 車載無線電信號處理器 |
| 文件頁數(shù)： | 35/64頁 |
| 文件大?。?/td> | 825K |
| 代理商： | TDA7406 |
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TDA7406
Functional Description of Stereodecoder
35/64
8
Functional Description of Stereodecoder
Figure 23.
Block diagram of the stereodecoder
The stereodecoder-part of the TDA7406 (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”. Adaptations like programmable input gain, roll-off
compensation, selectable de-emphasis time constant and a programmable field strength
input allow to use different IF-devices.
8.1
Stereodecoder-Mute
The TDA7406 has a fast and easy to control RDS-Mute function which is a combination of
the audioprocessor'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.
Figure 28
shows the output-signal V
O
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 connected to V
ref
to avoid any discharge of the coupling capacitor through
leakage currents. No further mute command should be applied.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA7407 | ADVANCED CAR SIGNAL PROCESSOR |
| TDA7409 | CARRADIO-SIGNAL-PROCESSOR |
| TDA7409D | CARRADIO-SIGNAL-PROCESSOR |
| TDA7410ND | Signal processor for car radio applications |
| TDA7410NDTR | Signal processor for car radio applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7406T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CAR RADIO SIGNAL PROCESSOR |
| 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 |
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