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Cadence Design Systems
Orcad electronic design automation (eda) software tools, fpga and pcb system design
http://www.orcad.com
Cohesion Systems Inc.
Schematic-driven tools that accelerate the development and debug process of Full Custom Analog and Mixed-Signal IC designs, as well as Complex, Multi-PCB System designs.
http://www.cohesionsystems.com
DDE Supermax ECAD
PCB, MCM, and hybrid layout supports all types of designs including advanced packaging, RF, microwave, and high-speed.
http://www.dde-eda.com
Point Design, Inc.
Designs and manufactures flexible printed circuits, printed wiring boards and Rigid-Flex circuits. They provide complete customer support from initial design concepts to finished assembled products.
http://www.point-design.com
Signal Integrity Software
Offers consulting services and EDA software for high-speed system design and analysis.
http://www.sisoft.com
Silicon Canvas, Inc.
Full custom layout tools for Analog/Mixed-Signal and SoC designs.
http://www.sicanvas.com