Tiger Electronic
Low Power Low Offset Voltage Quad Comparators
Unisonic Technologies
QUAD DIFFERENTIAL COMPARATOR
Philips Electronics
Quad voltage comparator
HTC Korea
QUAD Operational Amplifiers
3PEAK INC.
36V Low Power Dual/Quad Differential Comparators
Fairchild Semiconductor
Quad voltage comparators for square wave generator, time delay generators, pulse generators and etc
Motorola => Freescale
Quad Single Supply Comparators
Unisonic Technologies
QUAD DIFFERENTIAL COMPARATOR
STMicroelectronics
LOW POWER QUAD VOLTAGE COMPARATORS