KA9270 데이터 시트보기 (PDF) - Samsung

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KA9270

AUDIO FILTER

Samsung 

KA9270

AUDIO FILTER

TEST CIRCUIT

CH2

OUTPUT

(Vo)

3.3§Þ

10K

47§Þ

0.01§Þ

Vcc

1/2 Vcc

0.0015§Þ

5.6K

1M

0.0012§Þ

12K

330pF

+ 4.7§Þ

27K

27K

+

5.6K 5.6K

20

19

18

+ 4.7§Þ

17

16

15

14

13

12

11

Vcc

LPF2

-

-

+

+

DE-AMP2

-

+

-

+

BUFFER2

CH2-INPUT

(from SIGNAL

GENERATOR

5K

OUTPUT)

+

VI

-

1/2 Vcc

+

-

LPF1

MUTE

SW

DE-EM

SW

+

-

DE-AMP1

BUFFER1

+

-

1

CH1

OUTPUT

(Vo)

2

3

4

330pF

5.6K

5

6

7

8

9

5.6K

27K

+

27K

4.7§Þ

+

3.3§Þ

5.6K

0.0015§Þ

10K

MUTE

CONTROL

SIGNAL

(MUTE)

DE-EMPHASIS

CONTROL

SIGNAL

(DE-EM)

0.0012§Þ

12K

1M

10

5K

CH1-INPUT

(from SIGNAL

GENERATOR

OUTPUT)

+

VI

-

Fig. 2

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