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參數(shù)資料
| 型號： | TDA7402TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, 1.40 MM HEIGHT, TQFP-44 |
| 文件頁數(shù)： | 38/74頁 |
| 文件大?。?/td> | 1232K |
| 代理商： | TDA7402TR |
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TDA7402
Functional description of stereo decoder
6.8
Stereo blend control
The stereo blend control block converts the internal LEVEL voltage (LEVELSB) into an
demodulator compatible analog signal which is used to control the channel separation
between 0dB and the maximum separation. Internally this control range has a fixed upper
limit which is the internal reference voltage REF5V. The lower limit can be programmed
between 20 and 70% of REF5V in 3.3% steps (see
To adjust the external LEVEL voltage to the internal range two values must be defined: the
external level signal has to be amplified that internally it becomes equal to REF5V. The
second point (e.g. 10dB channel sep.) is then adjusted with the VSBL voltage.
Figure 31.
Internal stereo blend characteristics
The gain can be programmed through 4 bits in the "Stereo decoder adjustment" byte. All
necessary internal reference voltages like REF5V are derived from a bandgap circuit.
Therefore they have a temperature co-efficient near zero.
Figure 32.
Relation between internal and external LEVEL voltages for setup of
stereo blend
6.9
Highcut control
The highcut control set-up is similar to the stereo blend control set up : 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, 22, 28 or 33% of VHCH (see
INTERNAL
VOLTAGES
t
D00AU1168
VSBL
REF 5V
SETUP OF VST
INTERNAL
VOLTAGES
t
20%
REF 5V
SETUP OF VMO
LEVEL
LEVEL INTERN
FIELDSTRENGHT VOLTAGE
VST
VMO
LEVEL INTERN
70%
VSBL
VST
VMO
FIELDSTRENGHT VOLTAGE
相關(guān)PDF資料 |
PDF描述 |
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| TDA7402 | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| TDA7403D | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| TDA7403DTR | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| TDA7404DTR | 1 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| TDA7404D | 1 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7403 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:BASIC SIGNAL PROCESSOR |
| TDA7403_02 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:BASIC SIGNAL PROCESSOR |
| TDA7403D | 功能描述:音頻 DSP Basic Signal Process 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 |
| TDA7403DTR | 功能描述:音頻 DSP Basic Signal Process 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 |
| TDA7404 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CARRADIO-SIGNAL-PROCESSOR |
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