AN1512 Philips, AN1512 Datasheet - Page 5

• Manufacturer Part Number: AN1512
• Description: All in one NE5230
• Manufacturer: Philips

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Philips Semiconductors
MIDBAND FREQUENCY
The midband frequencies can be selected as described earlier. The
upper frequency of this band can be determined by connecting a
resistor from Pin 5 to Pin 4. The value of this resistor can be
determined by using the graph shown as Figure 6. The lower end of
this frequency is selected by using a second-order high-pass filter
with the upper band suppression done by using the bias adjust pin.
The lower end frequency was chosen to be about 500Hz and the
upper band was selected to be about 7.6kHz.
The midband frequencies can be selected as described earlier. The
upper frequency of this band can be determined by connecting a
resistor from Pin 5 to Pin 4. The value of this resistor can be
determined by using the graph shown as Figure 6. The lower end of
this frequency is selected by using a second-order high-pass filter
with the upper band suppression done by using the bias adjust pin.
The lower end frequency was chosen to be about 500Hz and the
upper band was selected to be about 7.6kHz.
1991 Dec
All in one: NE5230
NOTES:
All resistors in
All capacitors in F
INPUT
1k
0.01 F
0.047 F
0.006 F
10k
0.006 F
0.047 F
10k
10k
0.0047 F
10k
Figure 7. Audio Equalizer
10k
10k
NE5230
NE5230
NE5230
+
–
+
–
–
+
-V
-V
+V
1.2M
1.5M
-V
CC
CC
CC
CC
+V
5
+V
CC
CC
DC-1kHz
0.5kHz-
7.6kHz
3kHz-
26kHz
2k
2k
2k
1k
NE5230
+
–
-V
10k
+V
CC
CC
OUTPUT
AN1512
Application note
SL00910