Integrated Circuits - Harman Kardon Signature 1.5 Technical Manual

Two Channel Amplifier Harman Kardon

INTEGRATED CIRCUITS

U1 - LM393N DUAL COMPARATOR
A001-0005-0
1
OUTPUT A
INVERTING
2
INPUT A
NON-
3
INVERTING
INPUT A
4
GND
U2 - LM556CN DUAL TIMER
A001-2009-0
14 13 12
COMP
COMP
1
2 3
8
+V
S
7
OUTPUT B
INVERTING
6
INPUT B
NON-
5
INVERTING
INPUT B
11 10 9
COMP
FLIP FLOP
FLIP FLOP
COMP
5
4 6
SIGNATURE 1.5
8
7
1 8