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參數(shù)資料
| 型號： | TDA6170 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Components for Entertainment Electronics, Satellite Sound IF |
| 中文描述： | 元件娛樂電子，衛(wèi)星聲音中頻 |
| 文件頁數(shù)： | 11/27頁 |
| 文件大?。?/td> | 416K |
| 代理商： | TDA6170 |
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Data Sheet
TDA6170X
Semiconductor Group
7
21.7.99
7.6
The demodulated and level controlled audio signals are fed via low-pass filters to the inputs of two identical
expander circuits. The IF3 audio signal is also applied in parallel via different de-emphasis networks to the
input of the audio switch for broadband mono reception. The expander circuits have the reverse characteris-
tics of the audio compressor of the TV station. A 3 bit pre volume control (control byte 3: PVL2...PVL0 and
PVR2...PVR0) for each audio channel enables a correct adjustment of the expander characteristics and
allows the possibility to align to the right level for both broadband and smallband sound IF reception.
Expander Description
7.7
The input signals of the AF switch can be derived from the external audio input pair. However, these signals
can also be derived from either the different de-emphasis networks or from both expanders. The selection of
the output signals from IF1, IF2 or IF3 is done by using the I
2
C-bus interface. The switches are followed by a
volume control section with buffered outputs Ch1 and Ch2.
In case of small-band reception the demodulated signals of IF1 and IF2 are processed in both expanders and
fed to the switches. So it is possible to select one of each or both in the audio switches for both AF outputs
Ch1 and Ch2.
In the case of broad-band audio transmission with 50
μ
s, 75
μ
s or J17 pre-emphasis the IF3 input is active and
with the audio switch the demodulated audio signals are selected after the three de-emphasis networks and
fed to both AF outputs in mono mode.
The 3 bit volume control (control byte 2: VL2...VL0 and VR2...VR0) in front of each AF output enables the
same audio level for different FM deviations of several satellite transponders.
AF Switch and Volume Control
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA6170X | Components for Entertainment Electronics, Satellite Sound IF |
| tda 6190T | Digital TV Mixer(數(shù)字化TV混頻器) |
| tda 6190 | DVB-IF Mixer(DVB-IF 混頻器) |
| tda 6612-2 | TV-Stereo-Sound(TV 立體聲) |
| tda 6621 | TV-Stereocoder(TV 立體聲編碼器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA6170X | 制造商:Infineon Technologies AG 功能描述:Satellite Sound IF with Wegener Expander 28-Pin DSO 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TDA6190 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:DVB-IF Mixer |
| TDA6190T | 制造商:Infineon Technologies AG 功能描述: |
| TDA6190TGEG | 制造商:Infineon Technologies AG 功能描述:Electronic Component |
| TDA6190TGEGNT | 制造商:Infineon Technologies AG 功能描述:DVB-IF Mixer 16-Pin DSO T/R |
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