Technical Note

7/9

BA3308F,BA3308FV

www.rohm.com

2010.04 - Rev.A

© 2010 ROHM Co., Ltd. All rights reserved.

●Measurement circuit

●Application circuit

1

2

3

4

5

6

7

8

9

10

11

12

13

14

ALC

V

V

V

V

V

V

10k

10

μF

120k

1.2k

33k

0.1

μF

SW4A

100

μF

SW2A

22k

2

1

3

SW6A

30k

INPUT1

SW3A

3.9k

3.9k

SW3B

30k

INPUT2

SW6B

SW1B

3

2

1

2.2k

SW2B

100

μF

39

Ω

SW4B

2

1

0.1

μF

1.2k

120k

10

μF

10k

Ω

330

μF

220

Ω

SW5

22

μF

1M

VCC

OUTPUT1

OUTPUT2

2

1

33k

39

Ω

Fig.18

For playback, connect the following NAB time constant circuit between

pins 11 and 1 and pins 10 and 7 in place of R5 and R6.

INPUT1

INPUT2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

ALC

10

μF

100

μF

100

μF

39

Ω

10

μF

330

μF

220

Ω

22

μF

VCC=7V

3.9k

Ω

3.9k

Ω

10

μF

10

μF

R4

C4

R6

18k

Ω

C6

OUTPUT2

R8

1M

Ω

R7

C7

C8

18k

Ω

R5

C5

OUTPUT1

39

Ω

R3

R1

R2

C3

C2

C5

C9 (C10)

0.027

R9 (R10)

120k

Ω

R11 (R12)

4.3k

Ω

Fig.17