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Article: Vias reduce EMI in photonics ICs.(ELECTROMAGNETIC COMPLIANCE)(Integrated circuits)(Electro Magnetic Interference)(Inphi Corp.)(Brief Article)
- Article from:
- Test & Measurement World
- Article date:
- June 1, 2005
- Author:
CopyrightCOPYRIGHT 2005 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Inphi manufactures transimpedance amplifier ICs that its customers package with photodiodes into cases that they then install in optical transceivers. The photodiode converts light into current, which the amplifier converts into voltage. Because of price pressures, Inphi's customers want to package the chips into common component cases such as TO-46.
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When Inphi began producing 10-Gbps devices, the company's engineers found that the electrical signals between the photodiode and the amplifier interfered with signals on the amplifier die. Thus, they needed a way to reduce emissions.
A TO-46 case provides just four connections to ...