TDA8722 Philips Semiconductors, TDA8722 Datasheet - Page 15

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

Philips Semiconductors
APPLICATION INFORMATION
handbook, full pagewidth
1998 Jun 23
I
negative video modulation and FM sound
(1) K1: switches the pre-emphasis filter on or off.
(2) L5: air coil; 1.5 turns; diameter of 2 mm.
(3) L3: to adjust the application to the right sound carrier frequency (5.5 MHz for PAL G).
(4) K2: Switches the FM sound oscillator on or off.
2
C-bus programmable modulator for
VIDEO
AUDIO
R4
R1
K1
R2
(1)
20
100 nF
1
C19
100 nF
C20
2
L3
15 H
56 pF
K2
R3
19
C3
(3)
(4)
18
3
15 pF
C17
Fig.7 Reference measuring set-up.
R15
4
17
33 pF
C5
R5
BB215
TDA8722
L5
10 nF
16
(2)
D5
5
C7
100 pF
C16
6
33 pF
15
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
Product specification
2.2 F
4 MHz
27 pF
C9
Q9
C31
MBE403
TDA8722
2.2 F
C21
33 V
5 V
GND
PORT
SCL
SDA