參數(shù)資料
型號(hào)： STV8203D
廠商： 意法半導(dǎo)體
英文描述： MULTISTANDARD TV SOUND DEMODULATOR
中文描述： 多標(biāo)準(zhǔn)電視伴音解調(diào)器
文件頁(yè)數(shù)： 21/31頁(yè)
文件大?。?/td> 192K
代理商： STV8203D
ZWEITON
(Pilot Carrier and Tone DetectorThresholds)
Address
: 10
Type
: R/W
Reset
: 1000 1000
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
THRESH-SIG
THRESH-ST
THRESH-SIG : PilotCarrier Level Threshold
Set the sensitivityfor the pilot carrierdetector.
THRESH-ST
: Detected Tone Level Threshold
Set the detectionthresholdlevel for stereo and dual mono (bi-lingual) tones.
Power on default values give a detectionthreshold correspondingto a modulatedpilot carrier S/N of 0dB
(700Hz BW)and a S/N of 40dB for the recoveredaudio.
AGCC
(AGC Controlfor ADC)
Address
: 11
Type
: R/W
Reset
: 0001 0001
bit 7
bit 6
0
bit 5
0
bit 4
bit 3
bit 2
bit 1
bit 0
AGC-CMD
AGC-REF
AGC-CST
AGC-CMD : 1 = manual/forcedmode, 0 = automaticmode
Normally set to 0 enablingautomaticmode. In the case of systemL/L’,due to the presence
of the AM sound carrier, the AGC should be switched off. In this case, a fixed gain value
should be setusing the AGCSregister(see below).
This bit is controlledby AUTOSTANDARDwhen thisfunctionis activated.
AGC-REF : Definesthe clippinglevel.
Adjustthe allowableproportionof samplesat the inputof the ADC whichwill be clipped;the
AGC tries to maximise the use of the full scale range of the ADC. The default setting gives
a ratio of 1/256.
AGC-REF [4:2]
000
1/16 (single carrier)
001
1/32
010
1/64
011
1/128
100
1/256
101
1/512
110
1/1024
111
1/2048 (multiple carriers)
Clipping Ratio
AGC-CST : AGC time constant betweeneach step of 1.25dB.
For a 27MHzXTAL => 00 = 1.21ms, 01 = 2.43ms,10 = 4.85ms,11 = 9.7ms.
The adjustmentis a compromisebetween settling time and noise immunity.
PROGRAMMING THE DEVICE
(continued)
STV8203
21/31
相關(guān)PDF資料
PDF描述
STV8203 MULTISTANDARD TV SOUND DEMODULATOR
STV8206 Multistandard TV Audio Processor and Digital Sound Demodulator
STV8216 Multistandard TV Audio Processor and Digital Sound Demodulator
STV8226 Multistandard TV Audio Processor and Digital Sound Demodulator
STV8236 Multistandard TV Audio Processor and Digital Sound Demodulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
STV8206 功能描述:視頻 IC Audio Proc/Dig Demod RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
STV8207 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
STV8207T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
STV8211 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:VIDEO & SOUND IF SYSTEM
STV8216 功能描述:視頻 IC Audio Proc/Dig Demod RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
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