TDA7407D Datasheet, PDF (14/34 Pages) STMicroelectronics – ADVANCED CAR SIGNAL PROCESSOR

TDA7407D
Figure 9. Softmute Timing
1
EXT.
MUTE
+SIGNAL
REF
-SIGNAL
t(s) ¹
c I²C BUS
du ^OUT
D97AU634
Time
Pro _t(s) ^{Note: Please notice that a started Mute action is always terminated and could not be interrupted by a change of the mute signal.}
lete duc For timing purposes the Bit 3 of the I²C bus output register is set to 1 from the start of muting until the end
so ^{ro of demuting.}
- ^{Ob te P 6.2 BASS}
) ^{le There are four parameters programmable in the bass stage: (see figs 10, 11, 12, 13):}
t(s ^{so 6.2.1 Attenuation}
c ^{b Figure 10 shows the attenuation as a function of frequency at a center frequency at a center frequency of 80Hz.}
du _- ^O _{6.2.2 Center Frequency}
ro ⁾ Figure 11 shows the four possible center frequencies 60,70,80 and 100Hz.
P _{t(s 6.2.3 Quality Factors}
lete ^{uc Figure 12 shows the four possible quality factors 1, 1.25, 1.5 and 2.}
so ^{rod 6.2.4 DC Mode}
b P ^{In this mode the DC gain is increased by 5.1dB. In addition the programmed center frequency and quality}
factor is decreased by 25% which can be used to reach alternative center frequencies or quality factors.
O _{lete 6.3 MID}
so _{There are 3 parameters programmable in the mid stage (see figs. 14, 15 & 16)}
Ob6.3.1 Attenuation
Figure 14 shows the attenuation as a function of frequency at a center frequency of 1kHz.
6.3.2 Center Frequency
Figure 15 shows the four possible center frequencies 500Hz, 1kHz, 1.5kHz and 2kHz.
6.3.3 Quality Factor
Figure 16 shows the two possible quality factors 1 and 2 at a center frequency of 1kHz.
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