Arp 4023 voltage controlled low pass filter

Page 1

Fc CONTROL
INPUT

Fc CONTROL
INPUT

AUDIO
INPUT

. +15V .
Exponential Exponential If
M Converter R11 Converter POSITIVE ,
100K J_ 03 196K 05 J- SUPPLY @
7 menu 1% 2N5172 = + cs
BROWN BROWN E 1U;
06 Q W as new
TZ-581 {w Q5 11-531
BLUE BLUE GROUND @T
07 m r + EJF
m 2N5172 2N5172 W 35v
NEGATIVE ,
R19 CR3 SUPPLY o 7
R 1Ka7 H 1N4148 R13 R12 V
2K1 +asonRPM/K 27K 1K2 -15v
BALANCE 1W 3% 9 ® BALANCE
TRIM ® __= 1 _ TRIM
R16 R15 CR5 ' R13 R17
56K 33K 1mm 33K 56K
.15v -15v -15v
R3 [] R7 [] 53
615/9 +15v 611's: +15v 5, we
2 .-|: 2 _ AUDIO
R9 LM301A -69 ourpur
a 21 15K 3
4
(:2 :24
R2 R1 CAsoao I 1000 R6 R5 3°30 1000FF
100R 100R 100R 100R
1% 1% .15v = 1% 1% new =
E : Filter : : Filter CS R10
-15v CR1 -15v
Stage 1 .15v 33p}: Stage 2 '15V1N4143 3.3FF 3K2
. H .
I-~_I R11
470R
(9) CR1
1mm

NOTES:

TEST
POINT

RESONANCE
INPUT

1 ALL RESISTORS ARE 025W 10% UNLESS OTHERWISE SPECIFIED
2 1 UF CAPS ARE TANTALUM
3 03/05 AND QGIQB ARE THERMALLY COUPLED SELECTED PAIRS

4 Z1..,Z4 SHOULD BE SELECTED FOR LOW NOISE AND LOW OFFSEI'

%
4023

TITLE
4023 VOLTAGE CONTROLLED LOW

DESIGN BY ASSEMBLY
ARP INSTRUMENTS, INc.
PATENTS
1912
us «3,805,091
us «3,444,362
DRAWN BY DATE REV
.1 VERGHESE 20-AFR«96 B