Technical Note

7/9

BA3308F,BA3308FV

www.rohm.com

2011.08 - Rev.B

© 2011 ROHM Co., Ltd. All rights reserved.

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Measurement circuit

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Application circuit

1

2

3

4

5

6

7

8

9

10

11

12

13

14

ALC

V

V

V

V

V

V

10k

10μF

120k

1.2k

33k

0.1μF

SW4A

100μF

SW2A

22k

2

1

3

SW6A

30k

INPUT1

SW3A

3.9k

3.9k

SW3B

30k

INPUT2

SW6B

SW1B

3

2

1

2.2k

SW2B

100μF

39Ω

SW4B

2

1

0.1μF

1.2k

120k

10μF

10kΩ

330μF

220Ω

SW5

22μF

1M

VCC

OUTPUT1

OUTPUT2

2

1

33k

39Ω

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

10μF

100μF

100μF

39Ω

10μF

330μF

220Ω

22μF

VCC=7V

3.9kΩ

3.9kΩ

10μF

10μF

R4

C4

R6

18kΩ

C6

OUTPUT2

R8

1MΩ

R7

C7

C8

18kΩ

R5

C5

OUTPUT1

39Ω

R3

R1

R2

C3

C2

C5

C9 (C10)

0.027

R9 (R10)

120kΩ

R11 (R12)

4.3kΩ

Fig.17