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參數(shù)資料
| 型號： | TDA9803T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | VIDEO DISCRIMINATOR, PDSO20 |
| 封裝： | 7.50 MM, PLASTIC, MS-013AC, SOT-163-1, SOP-20 |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 165K |
| 代理商： | TDA9803T |
November 1992
11
Philips Semiconductors
Preliminary specication
Multistandard VIF-PLL demodulator
TDA9803
9. The intercarrier output signal is superimposed to the video signal at pin 13 and can be calculated by the following
formula:
with:
and
±2 dB = tolerance of intercarrier output amplitude Vo FM.
10. Measurements taken with SAW filter G1956; modulation: VSB, fvideo > 0.5 MHz, loop bandwidth BL = 60 kHz.
11. The 7 dB buffer gain accounts for 1 dB loss in the sound trap. Buffer output signal is typical 2 V (p-p). If no sound
trap is applied a 330
resistor must be connected from output to input (from pin 13 to pin 14).
12. The leakage current of the AGC capacitor has to be
< 1 A in B/G mode (< 30 nA in L mode) to avoid larger tilt.
13. S/N is the ratio of black-to-white amplitude to the black level noise voltage (RMS value, pin 7). B = 5 MHz weighted
in accordance with CCIR-567 at a source impedance of 50
.
14.
α1.1 = 20 log (Vo at 4.4 MHz / Vo at 1.1 MHz) + 3.6 dB; α1.1 value at 1.1 MHz related to black/white signal
α3.3 = 20 log (Vo at 4.4 MHz / Vo at 3.3 MHz); α3.3 value at 3.3 MHz related to colour carrier.
15. To match the AFC output signal to different tuning systems a current source output is provided (Fig.8).
16. Depending on the ratio
C/Co of the LC resonance circuit of VCO
(Qo > 50; Co =Cint + Cext; Cext = 8.2 pF; Cint ≈ 8.5 pF).
20
V
13 interc. p-p
()
1 V (p-p)
-------------------------------------
log
V
iSC
V
iPC
------------
6.9 dB
2 dB
±
+
=
V
iSC
V
iPC
------------ dB = sound to picture carrier ratio at IF input
pins 1 and 2
) in dB
(
相關PDF資料 |
PDF描述 |
|---|---|
| TDA9803 | AM, VIDEO DISCRIMINATOR, PDIP20 |
| TDA9803T-T | VIDEO DISCRIMINATOR, PDSO20 |
| TDA9804 | AUDIO/VIDEO DEMODULATOR, PDIP20 |
| TDA9808N | AUDIO/VIDEO DEMODULATOR, PDIP20 |
| TDA9808TD-T | AUDIO/VIDEO DEMODULATOR, PDSO20 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9806 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multistandard VIF-PLL and FM-PLL demodulator |
| TDA9808 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard VIF-PLL with QSS-IF and FM-PLL demodulator |
| TDA9808T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard VIF-PLL with QSS-IF and FM-PLL demodulator |
| TDA9809 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard multimedia IF-PLL and FM radio demodulator |
| TDA9809M | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single standard multimedia IF-PLL and FM radio demodulator |
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