SL5067

7

16

1

15

2

14

3

13

4

12

5

11

6

10

7

9

8

17

18

19

20

16

1

15

2

14

3

13

4

12

5

11

6

10

7

9

8

17

18

VIDEO INPUT

4MHZ

18p

SDA

SCL

NC

NC

NC

NC

NC

NC

NC

NC

10n

100n

180n

22K

39n

75

75

MODULATED

OUTPUT

75

W

10n

10nF

330n

470nF

1n

1n

1.2p

1.5p

+30V

22K

2N3904

10n

10K

22K

BB405

100p

5p6

2 turns 6mm

∅

1 turn 6mm ∅

100nF

100pF

1.2p

1.5p

5.6

m

120p

220p

AUDIO

INPUT

220K

Fig.14 typical application showing video modulator with synthesised oscillator

470n

100nF

1nF

1nF

RV1

RV2

NOTES:–

RV2 adjusts the picture carrier to sound carrier ratio

RV1 adjusts the modulation index

G

and

ND

The values chosen must reproduce the correct bias voltages on the relevant input pins

22K

75

W

480

85

80

75

70

65

60

55

50

45

40

35

30

25

20

20

40

60

80

100 120 140 160 180 200 220 240 260 280

0

40

80

120

160

200

240

280

320

380

400

440

Q=16

Q=2

Q=8

OUTPUT

LEVEL

(dB

mV)

UNTERMI-

NATED

FM

DEVIATION

(kHz/V)

PICTURE

CARRIER

SOUND

SUBCARRIER

DEVIATION

3rd HARMONIC

SOUND TANK CAPACITANCE