- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98196 > TDA7461ND (STMICROELECTRONICS) SPECIALTY CONSUMER CIRCUIT, PDSO28 PDF資料下載
參數(shù)資料
| 型號： | TDA7461ND |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| 封裝： | SOP-28 |
| 文件頁數(shù)： | 22/48頁 |
| 文件大?。?/td> | 437K |
| 代理商： | TDA7461ND |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁當前第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁
TDA7461
Stereo decoder part
All necessary internal reference voltages like REF5V are derived from a band gap circuit.
Therefore they have a temperature coefficient near zero. This is useful if the fieldstrength
signal is also temperature compensated.
But most IF devices apply a LEVEL voltage with a TC of 3300 ppm. The TDA7461 offers this
TC for the reference voltages, too. The TC is selectable with bit D7 of the “stereo decoder
adjustment" byte.
Figure 23.
Relation between internal and external LEVEL voltage and setup of
Stereo blend
4.5.9
High cut control
The high cut control setup is similar to the stereo blend control setup: the starting point
VHCH can be set with 2 bits to be 42, 50, 58 or 66% of REF5V whereas the range can be
set to be 17 or 33% of VHCH (see Figure 24).
High cut characteristics
4.6
FUnctional description of the noise blanker
In the automotive environment the MPX signal is disturbed by spikes produced by the
ignition and for example the wiper motor. The aim of the noise blanker part is to cancel the
audible influence of the spikes. Therefore the output of the stereo decoder is held at the
actual voltage for 40 s.
In a first stage the spikes must be detected but to avoid a wrong triggering on high
frequency (white) noise a complex trigger control is implemented. Behind the trigger stage a
pulse former generates the "blanking" pulse. To avoid any crosstalk to the signal path the
noise blanker is supplied by his own biasing circuit.
INTERNAL
VOLTAGES
t
D97AU639
VSBL
REF 5V
SETUP OF VST
INTERNAL
VOLTAGES
t
33%
REF 5V
SETUP OF VMO
LEVEL
LEVEL INTERN
FIELDSTRENGHT VOLTAGE
VST
VMO
LEVEL INTERN
42%
50%
58%
VSBL
VST
VMO
FIELDSTRENGHT VOLTAGE
LOWPASS
TIME CONSTANT
D97AU640
τDeemp
FIELDSTRENGHT
VHCH
VHCL
3
τDeemp
相關PDF資料 |
PDF描述 |
|---|---|
| TDA7461NDTR | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| TDA7461N | SPECIALTY CONSUMER CIRCUIT, PDIP28 |
| TDA7462D | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| TDA7463AD | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20 |
| TDA7463A | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7461NDTR | 功能描述:音頻 DSP CAR RADIO SIGNAL RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TDA7462 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DUAL AUDIOPROCESSOR WITH COMPANDER AND SUBWOOFER OUTPUT |
| TDA7462D | 功能描述:音頻 DSP Dual Audioprocessor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TDA7462D013TR | 功能描述:音頻 DSP DUAL AUDIOPROCESSOR COMPANDER /SUBWOOFER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TDA7463A | 功能描述:多媒體雜項 Lo Vltg TONE CONTROL RoHS:否 制造商:Texas Instruments 類型: 通道數(shù)量: 轉(zhuǎn)換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復。