TDA8722 Philips Semiconductors, TDA8722 Datasheet - Page 16

• Manufacturer Part Number: TDA8722
• Description: I2C-bus programmable modulator for negative video modulation and FM sound
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Application design
1998 Jun 23
handbook, full pagewidth
I
negative video modulation and FM sound
(1) RV1 allows fine adjustment of the modulation depth between 70 and 90%.
2
C-bus programmable modulator for
VIDEO
AUDIO
R1
R2
20
100 nF
1
C19
100 nF
C20
2
15 H
56 pF
L3
R3
19
C3
Fig.8 Application using an asymmetrical output.
18
3
100 k
RV1
C17
15 pF
(1)
R15
4
17
33 pF
C5
82 k
R5
R17
BB215
TDA8722
L5
10 nF
16
D5
5
C7
100 pF
C16
6
16
33 pF
C6
R6
15
100 pF
R7
C15
7
T8
14
8
150 nF
C8
R8
BC547B
13
R9
12
9
11
10
10 nF
10 nF
C11
C30
MBE405
Product specification
Q9
4 MHz
27 pF
C9
TDA8722
PORT
SCL
SDA
5 V
33 V
GND