GP520A Datasheet, PDF (5/10 Pages) List of Unclassifed Manufacturers – Programmable Analog Signal Processor

2n2 2n2
V_{CC A OUT}
HPFB
HP
9
15 18
19
13 VOLTAGE
REGULATOR
3µ3
A_IN 14
10µ
R_IN14
+
PREAMP
-
40K
+ _HP
2R _FILTER
-
1n5
680p
TP
68n
LPFB
BUFFER
OUT
22 24 BUFFER
IN
26 27
R
+
LP
FILTER
-
R
10n 10n
68n
10K
1
31
30 5 ^BIN
B_{OUT VCC}
7
2k2
11
D_OUT
R
10K
0.6V
LIN/LOG
CONVERTER
12
6
20
P GND GND
I _HP
PINK
NOISE
I _HP
GENERATOR
0.6 V
LIN/LOG
CONVERTER
21
I _LP
I _LP
All resistors in ohms, all capacitors in
farads, unless otherwise stated.
Fig. 4 AC Test Circuit for High & Low Pass Filters
10k
10k
I_HP = 1.875 x I_R
1k
100
80 _{0 0.25 0.5 0.75 1}
1.25 1.5 1.75
2
NORMALIZED I _HP / I _R CURRENT
Fig. 5 High Pass Filter Corner Frequency vs I_HP Current
(Note 1) (Fig.4 Test Circuit)
1k
700
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2
NORMALIZED I _HP / I _R CURRENT
Fig. 6 Low Pass Filter Corner Frequency vs I_LP Current
(Note 1) (Fig.4 Test Circuit)
NOTES: 1. Corner frequency calculated in reference to signal at 3 kHz
5
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