STA381BW datasheet(29/174 Pages) STMICROELECTRONICS

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DocID018835 Rev 8

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STA381BW

Device overview

The second processing stage embeds a mixing block, a biquadratic/crossover filter, a DRC

stage, the volume control, a DC cut filter and a post scaler. Depending on the device

settings, the following configuration and features are available:



2.1 output with individually configurable anticlipper/DRCs (Figure 7): two individually

configurable DRC/anticlippers are available while the eighth biquadratic filter, jointly

with the mixer block, can be used to perform LFE. This configuration and features

ensure the backward compatibility with previous Sound Terminal® products.

Figure 7. Processing path, second part: 2.1 output with individually configurable

anticlipper/DRCs

C ros sov er F requenc y

D eterm ined by XO Setting

(User Defin ed If

XO =0000)

C1Mx1

U s er-D efined

M ix C oeffic ients

Ch annel ½

Biq uad #8

--------------

Hi-p ass XO

Filter

Ch an n el 1

Vo lume

An ti-clipper

DRC

DC Cut

Filter

Po st Scale

C1Mx2

C2Mx1

Ch annel ½

Biq uad #8

--------------

Hi-p ass XO

Filter

Ch an n el 2

Vo lume

An ti-clipper

DRC

DC Cut

Filter

Po st Scale

C2Mx2

C3Mx1

Ch an n el 3

Biq uad #8

--------------

Lo w-p ass XO

filter

An ti-clipper

DRC

DC Cut

Filter

Po st Scale

C3Mx2

Ch an n el 3

Vo lume

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