IBM 1620 Manual page 42

C Amp
Sense
Amp
Voltage Pattern Voltage Pattern
7b - Page 4.7 7c and 8b - Page 4. 7
F
Amp t-H_---
C
Pre Voltage Pattern
Sense 7a
&
8a _ Page
Amp
rA~~
________
4~._7~
Current Patterl_J. _ _ _ -"\:;::_-=i=~
3 - Page 4.5
Voltage Pattern
2 - Page 4.5
IS
Current
Source
G
A
D
Current
B Driver
C
Matrix
Switch
Voltage Pattern
9a - Page 4.7
C D
Inhibit
Driver
A
Current Pattern
9b - Page 4.7
Voltage Pattern
6a - Page 4.6
E SWD
;..IL-
Current Pattern
6b - Page 4.6
Voltage Pattern
6c - Page 4.6
K
Decode
Switch
SWD
Decode
Switch
D
Unselected
F
Current Pattern
'--------_-1--__ --'
6d - Page 4. 6
Selected
Voltage Pattern
Ib - Page 4.5
Current Pattern
4a - Page 4.6
t11tt11111
TYPICAL CORE STORAGE CIRCUITRY