Cosemi Technologies, Inc.

Charles Phillip McClay

Robert Monroe Smith

Wu-Chun Chou

Iain Ross Mactaggart

John J Stronczer

Michael Eugene Davis

Operational and functional testing of the optical Physical Media Dependent Integrated Circuits ('PMD ICs') is achieved by constructing a switchable on-chip load with similar or equivalent electrical characteristics of a targeted photonic device.

On-chip built-in test and operational qualification

A balanced differential transimpedance amplifier with a single-ended input operational over a wide variation in the dynamic range of input signals. A threshold circuit is employed to either or a combination of (1) generate a varying decision threshold to ensure a proper slicing over a wide range of input current signal levels; and (2) generate a bias current and voltage applied to an input of a transimpedance stage to cancel out a dependence of the transimpedance stage voltage input on input current signal levels.

Balanced differential transimpedance amplifier with single ended input and balancing method

A power efficient device for driving a load comprising a low current path and a high current path, wherein the high current path is driven by a first voltage source. In order to accommodate larger turn on voltages of possible load devices while maintaining low power operation, an additional voltage source exceeding the voltage source in the high current path is introduced in the low current path.

Growing community of inventors

Fountain Hills, AZ, United States of America

Charles Phillip McClay