TDA7405 datasheet(14/56 Pages) STMICROELECTRONICS

Nome de Peças	TDA7405

Descrição Electrónicos	EQUALIZER CARRADIO SIGNAL PROCESSOR

PDF	56 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

Logo

14 / 56 page

TDA7405

14/56

2.6 SoftStep-Volume

When the volume-level is changed audible clicks could appear at the output. The root cause of those clicks

could either be a DC-Offset before the volume-stage or the sudden change of the envelope of the audiosignal.

With the SoftStep-feature both kinds of clicks could be reduced to a minimum and are no more audible. The

blend-time from one step to the next is programmable in four steps.

Figure 6. SoftStep-Timing

Note: For steps more than 0.5dB the SoftStep mode should be deactivated because it could generate a hard 1dB step during the blend-time

2.7 Bass

There are four parameters programmable in the bass stage:

2.7.1 Attenuation

Figure 7 shows the attenuation as a function of frequency at a center frequency of 80Hz.

Figure 7. Bass Control @ fC = 80Hz, Q = 1

1dB

0.5dB

-0.5dB

-1dB

SS Time

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

10.0

100.0

1.0K

10.0K

TDA7405 Folha de dados(PDF) 14 Page - STMicroelectronics