TDA9183 Просмотр технического описания (PDF) - Philips Electronics

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производитель

TDA9183

Integrated NTSC comb filter

Philips Electronics 

Philips Semiconductors

Integrated NTSC comb filter

Objective specification

TDA9183

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

SUPcomb(chrom)

suppression (comb depth) COMB mode; note 2

with respect to chrominance and Fig.7

band pass at f = fSC

f = 2---2-2--2-7---7-.-5-- × fSC

30

−

−

f = -2---22---7-2---7-–--.--5-5---9-- × fSC

30

−

−

f = 2----2-2--7-2---7-+---.-5-5---9-- × fSC

30

−

−

Ro

output resistance

ZL

load impedance

−

−

500

−

−

15

Notes

1. The pulse should fall inside the line-blanking interval, after the rising edge of the synchronizing pulse.

2. fSC = colour subcarrier frequency; fSC = 3.579545 MHz for the NTSC M system.

3. With respect to 227.5 colour subcarrier periods (equals 63.556 µs) due to 1H delay in the comb filter.

4. With respect to the voltage level during clamping.

5. Test signal for NTSC M: 100% amplitude FCC multi-burst (see Fig.4).

6. Test signal for NTSC M: 100% white 75% amplitude FCC colour bar.

UNIT

dB

dB

dB

Ω

pF

handbook, full pagewidth

1

(V)

0.5 1.5 2.0 3.0 3.58 4.1 MHz

0.65

0.45

0.30

0.15

0

MGT522

Fig.4 100% amplitude FCC multi-burst.

2000 Nov 30

11

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