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TDA9808T

Single standard VIF-PLL with QSS-IF and FM-PLL demodulator

Philips Electronics 

Philips Semiconductors

Single standard VIF-PLL with QSS-IF and

FM-PLL demodulator

Product specification

TDA9808

75

handbook, halfpage

S/N

(dB)

50

MED684

handbook, halfpage

13.2 dB

21 dB

3.2 dB

13.2 dB

21 dB

10 dB

25

0

−60

−40

−20

0

20

Vi (VIF)(rms)(dB)

0.06

0.6

6 10

60

600

Vi (VIF)(rms)(mV)

Fig.6 Typical signal-to-noise ratio as a function of

IF input voltage.

SC CC

PC

BLUE

SC CC

PC

YELLOW

MHA739

SC = sound carrier, with respect to sync level.

CC = chrominance carrier, with respect to sync level.

PC = picture carrier, with respect to sync level.

Fig.7 Input signal conditions.

hand3b.o0oVk, halfpage

2.85 V

zero carrier level

white level

handbook,1h0alfpage

(1)

(dB)

−10

(2)

−30

(3)

MHA741

1.85 V

1.5 V

M, N standard

black level

sync level

MHA740

Fig.8 Typical video signal levels on output pin 9

(sound carrier off).

−50

−70

30

50

70

90

110

input voltage (dBµV)

(1) Signal.

(2) AM rejection.

(3) Noise.

Fig.9 Typical audio level, noise and AM rejection

(50% FM deviation).

1999 Jun 04

19

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