LC75421 datasheet(18/24 Pages) SANYO

Part #	LC75421

Description	Electronic Volume Controller for Cars

PDF	24 Pages

Scroll/Zoom	100%

Manufacturer	SANYO [Sanyo Semicon Device]

Direct Link	https://www.sanyo-av.com/us/

Logo

18 / 24 page

No. 6866-18/24

LC75421M

Bass Shelving Circuit

The equivalent circuit and calculation formula during boost are shown below.

• Bass band equivalent circuit diagram

• Calculation example 1

Specification Mean frequency: f0 = 40 Hz

Gain during maximum boost: G + 14 dB = 14 dB

Let us use R1 = 0 k

Ω, R2 = 45.054 kΩ, C1 = 2.2 µF, and C1 >> C2.

We obtain R3 from G = 14 dB.

We obtain C2 from mean frequency f0 = 40 Hz.

+14 dB

= 20 × LOG

+ R3

10G/20 –1

45054

5.01 – 1

≠ 11 KΩ

f 0

R3R2C1C2

πf0)2 R2R3C1

π × 40)2 × 45054 × 11000 × (2.2 × 10–6)

≠ 0.015 µF

Simulation Results

Setting

f = 100 Hz

f = 1 kHz

14 dB

13.55

3.65

12 dB

11.73

3.51

10 dB

9.8

3.31

8 dB

7.89

6 dB

5.94

2.55

4 dB

3.97

1.92

2 dB

1.99

1.07

LC75421 Datasheet(PDF) 18 Page - Sanyo Semicon Device

LC75421 Datasheet(HTML) 18 Page - Sanyo Semicon Device

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Datasheet Download

Link URL