HP 8903B - Page 134

Model 8903B Service
SCHEMATIC SYMBOLOGY AND SCHEMATIC DIAGRAM NOTES
L H H
1 L L L
1
NAND GATE
OPEN COLLECTOR
OUTPUTS (TTL)
+V
I
.'
AND GATE
INVERTER
OPEN EMITTER
OUTPUTS (ECL)
OR GATE ]A( BI XI
ADx
B
EXCLUSIVE-OR
GATE
B
OR GATE WITH
INVERTED INPUTS
BUX
NOR GATE
ADX B
AND GATE WITH
INVERTED INPUTS
L H L
L H
BUFFER
X
X
Wl L H
I
C I
I I
I :I*
EXTERNAL *,-
PULL-DOWN Iv
RESISTOR
8-29