13

Video ICs

BA7207AS / BA7207AK

BA7207AS (SDIP32)

To cancel the temperature characteristic of the ID, the resistors marked with asterisks should be of the metal film, and have a

temperature coefficient

± 100ppm / °C.

The 100pF capacitor connected to pin 16 is intended to reduce temperature disper of the gate phase.It should have a static

capacitance tolerance of

± 10% or Ic and a temperature coefficient of ± 30ppm / °C ( – 55°C to + 125°C) A (CG).

∗

Vreg

× 2

× 2

2.2MHz

BPF

PAL

SCM

R

R

P

P

P

P

P

R

R

R

R

4.3MHz

BPF - A

4.3MHz

BPF - B

PB

SYNC GATE

1.1MHz

BPF

MODE

CONTOROL

REC

SYNC GATE

SYNC GATE TIMING

GENERATOR

BELL

DET

VCO

SCM PAL

÷ 4

EQ

LIM

LIM

33k

0.01

0.01

100k

10k

0.01

0.47

7.5k

7.5k

FREQUENCY

ADJUSTER

∆

47

0.01

0.01

0.01

0.01

0.1

0.1

0.1

0.01

47

0.1

µ

27p

∆

100

LPF

PAL REC C.

REC C OUT

SCM / PAL

REC / PB

PBIN

B / W

SYNC IN

PALPB C

PB C OUT

RECIN

∆

100p

∗

∗

∗

∗

∗

VR1

VR2

VR3

2KVR

× 2

∆

1k

12

560p

100p

Fig. 6

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

3

4

5

6

7

8

9

10

11

12

13

14

15

16

12

+