M61530FP

Rev.1.0, Sep.19.2003, page 13 of 18

Functional description

(1) Equivalent circuit of the bass-boost circuit

Output

0dB

G0

F0

Q=4 (G=10dB)

Input

+K

K=1

R2

C2

C1

VO

R1

VI N

Note: Resistor R2 is within the IC. (R2 214k

Ω ± 30%)

fo =

2

π R1R2C1C2

1

Hz

Q =

R1(C1+C2)+(1-K)R2C2

R1R2C1C2

Amplitude characteristics of the second-order high-pass filter (reference)

Q

G0

1

0 to1dB

2

6dB

4

10dB

5

13dB

10

20dB