TDA7718B datasheet(17/40 Pages) STMICROELECTRONICS

部件名	TDA7718B

功能描述	3 band car audio processor

PDF	40 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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17 / 40 page

DocID18305 Rev 3

17/40

TDA7718B

Description of the audioprocessor

4.4

Soft-step 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 audio signal. With the soft-step-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 as 5 ms or 10 ms. The soft-step control is described in detail in Chapter 4.9.

4.5

Bass

There are four parameters programmable in the bass stage:

4.5.1

Bass attenuation

Figure 8 shows the attenuation as a function of frequency at a center frequency of 80 Hz.

Figure 8. Bass control @ fC = 80 Hz, Q = 1

TDA7718B 数据表(PDF) 17 Page - STMicroelectronics