AKD4753-A Datasheet, PDF (18/60 Pages) Asahi Kasei Microsystems – AK4753 Evaluation Board Rev.2

[AKD4753-A]
1-4-1. Parameter Setting
(1) Please set a parameter of each Filter.
Parameter
Sampling Rate
HPF
Cut Off Frequency
LPF
Cut Off Frequency
5 Band Equalizer
EQ1-5 Center Frequency
EQ1-5 Band Width
EQ1-5 Gain
Function
Sampling frequency (fs)
Setting Range
7350Hz ≤ fs ≤ 48000Hz
High pass filter cut off frequency
1.042x10^-3 ≤ fc/fs ≤ 0.24
Low pass filter cut off frequency
5.208x10^-3 ≤ fc/fs ≤ 0.24
EQ1-5 Center Frequency
EQ1-5 Band Width
EQ1-5 Gain
(Note 1)
(Note 2)
3.125x10^-3 ≤ fon/fs < 0.4969
fbn/fs ≤ 0.25
-1≤ Gain < 3
Table 6. Parameter Setting
Note 1. A gain difference is a bandwidth of 3dB from center frequency.
Note 2. When a gain is smaller than 0 , EQ becomes a notch filter.
(2) “HPF LPF Enable” , “HPF” ,”LPF” , “EQ1”, “EQ2”, “EQ3”, “EQ4”, “EQ5”
Please set ON/OFF of Filter with a check button. When checked it, Filter becomes ON.
When “Notch Filter Auto Correction” is checked, perform automatic correction of the center frequency
of the notch filter is executed.
Figure 24. Filter ON/OFF setting button
KM103902
- 18 -
2011/01