Philips Electronics

Low power dual operational amplifiers

ON Semiconductor

Single Supply Quad Operational Amplifiers

Intersil

Dual, 1MHz, Operational Amplifiers for Commercial Industrial, and Military Applications

Fairchild Semiconductor

Quad voltage comparators for square wave generator, time delay generators, pulse generators and etc

ON Semiconductor

Single Supply Dual Operational Amplifiers

3PEAK INC.

36V Low Power Dual/Quad Differential Comparators

Philips Electronics

Low power dual voltage comparator

KEXIN Industrial

Dual Differential Comparator

Motorola => Freescale

QUAD DIFFERENTIAL INPUT OPERATIONAL AMPLIFIERS

Philips Electronics

Low power dual operational amplifiers

Motorola => Freescale

Quad Single Supply Operational Amplifiers

Tiger Electronic

LOW POWER DUAL VOLTAGE COMPARATORS

Harris Semiconductor

Dual, 1Mhz, Operational Amplifiers for Commrcial Industrial, and military Applications

Philips Electronics

Quad voltage comparator