Apex company designs and produces single chip and hybrid IC microelectronic components. At present, it has three main production lines: power amplifier, PWM amplifier and DC-DC converter. It is a leader in power amplifier and hybrid signal products. Headquartered in Tucson, Arizona, the company employs about 100 people. Using mixed signal products not only simplifies the product design, but also has higher reliability than the traditional discrete device design. Apex's production quality implements a quality management process known as sigma plus. The company is a qml-38534 certified factory, and has passed ISO9001 certification. It is the first hybrid IC manufacturer to pass both dscc1772 and ISO9001 certification.