Arp 4072 voltage controlled filter

Page 1

Fc CONTROL
INPUT

Fc CONTROL
INPUT

GAIN TRIM

NON-INVER'HNG
INPUT

INVERTlNG
INPUT

CVR TRIM

CVR TRIM

POSITIVE
5U PPLV

GROUND

C5

0.01m:
R23 H Exponential _ _
11137 Converter Supply Supply Rail Level Shifter
+3500PPMIK El 013 Conditioner Splitter Amplifier
1w 3A +15V 2N3so4 J; 015 016 R41 R41
RED 13:1 2N3906 2N3906 12/ 19/0
014 NEGATIVE ,_" ,_
2N3906 SUPPLY L I-l 1_1
4 ZZA BLUE
M 53 c3 R31 R32 R37 (:10 ouwur
14v R39 101: 4K7 10K 10K T 1DUF
- 1K3 -( :)
v R30 35V + 14v = = 35v
-14v 5" 39K (:7 R33 zzia
017 T + 10UF 10K R43 LM1453
R2; 14v 2N3903 35v 100K
R27 56K ' T T 1".
270K 13 .1" /
E Signal Limiter Filter Filter Filter Filter
0 Level Shifter Stage 1 Stage 2 Stage 3 Stage 4
1
D R3 [] R2 [] R4 [I R9 R7 [] R5 [] R14 R12 [] R13 [] R19 R17 [] R13
010 220R 4K7 220R 220R 4K7 220R 220R 4K7 220R 220R 4K7 220R
2N5037 IZKZI [2K2] [2K2] mg]
35 BE [Iii :I-1
R35 R1 R21 R6 R22 R11 R23 R16
210R 12K1 12K1 12K1 um um um 12x1
1% 1% 1% 1% 1% 1% 1%
T L 02 m as as
01% 2N5037 (:3 2N5037 o5 2N5037 o7 2N5037
R25 2N5037 2N5037 2N5037 2N5037
100K II II II II
®-I:I- II II II
R23 (:1 c2 c3 04
4700PE
100K 4700PF 47001» 4700PI=
®-l:l7 14 , 3 , 11 7 a
10
12 13
+15v 7 21A 215 21c Z!
A R5 [I LM3900N R10 LM3900N R15 LM3900N R20 LM3900N
@ El , 22M .14v 22M 22M 22M
R34
100R 5* 59
10UF
: 35v
: RV1
7 _1 4v 100K 7
Bias Trim
NOTES:
1. ALL RESISTORS ARE 0.25w 10% UNLEss OTHERWISE SPECIFIED "LE 4071 vomss CONTROLLED Lownss mm
2. ALL 10UF CAPS ARE TANTALUM DESIGN By ASSEMELV
3. PAIRED PNP TRANSISTORS ARE MATCHED AND THERMALLY COUPLED
TIMOTHY C. GILLETTE
4. 013/014 ARE SELECTED AND THERMALLY COUPLED ALAN R PEARLMAN 1:111:
MODIFICATIONS (DESIGN BY TIMOTHY SMITH): ¢ ARNNSTRUMENW ma 3: 2.33:3:
5. R2, R7, R12, R17 SHOULD BE CHANGED TO 2K2 FOR IMPROVED CUTOFF RANGE '5 115134441362
4 o 72 DRAWN 511 DATE REV
J VERGHESE 16-APR-95 D

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5.1 Types of Voltage Controlled Filter not encapsulated. In order to use the newer style

Modules: 4012,4072 filter in an older unit, modifications are required
to the control input as shown on the circuit below.
The later model 2601s use a 4072 filter module. The newer 4072 module is identical in operation
This module is physically larger than the 4012 and is to the 4012.
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