參數(shù)資料
型號(hào)： TDA7407TR
廠商： STMICROELECTRONICS
元件分類(lèi)： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP44
封裝： 10 X 10 MM, 1.40 MM HEIGHT, LQFP-44
文件頁(yè)數(shù)： 21/46頁(yè)
文件大小： 692K
代理商： TDA7407TR
Obsolete
Product(s)
- Obsolete
Product(s)
Multipath detector
TDA7407
5.2.4
De-emphasis and Highcut.
The lowpass filter for the de-emphasis allows to choose between a time constant of 50
μs
and 75
μs (bit D7, stereo decoder byte).
The highcut control range will be in both cases
τ
HC = 2 τDeemp. Inside the highcut control
range (between VHCH and VHCL) the LEVEL signal is converted into a 5 bit word which
controls the lowpass time constant between
τ
Deemp...3 τDeemp. There by the resolution will
remain always 5 bits independently of the absolute voltage range between the VHCH and
VHCL values.
The highcut function can be switched off by I2C bus (bit D7, fieldstrength byte set to "0").
5.2.5
PLL and pilot tone detector
The PLL has the task to lock on the 19kHz pilotone during a stereo transmission to allow a
correct demodulation. The included detector enables the demodulation if the pilot tone
reaches the selected pilot tone threshold VPTHST. Two different thresholds are available. The
detector output (signal STEREO, see block diagram) can be checked by reading the status
byte of the TDA7407 via I2C bus.
5.2.6
Field strength control
The fieldstrength input is used to control the high cut and the stereoblend function. In
addition the signal can be also used to control the noiseblanker thresholds and as input for
the multipath detector.
Figure 21.
Relation between internal and external LEVEL voltage and setup of
stereoblend
Figure 22.
High cut characteristics
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(guān)PDF資料
PDF描述
TDA7407 SPECIALTY CONSUMER CIRCUIT, PQFP44
TDA7409D 1 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20
TDA7410NDTR 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20
TDA7410ND 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20
TDA7410 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7409 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CARRADIO-SIGNAL-PROCESSOR
TDA7409D 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
TDA7409DTR 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
TDA7410D 制造商:STMicroelectronics 功能描述:
TDA7410ND 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Signal processor for car radio applications
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*