Primarion Corporation

C Phillip McClay

Robert T Carroll

Kannan Raj

Suresh V Golwalkar

John M Burns

David W Self

Noah Davis

Wuchun Chou

Robert M Smith

Disclosed is current driver circuit comprising a bandgap reference circuit for generating a fixed current and a current proportional to absolute temperature (PTAT), a temperature compensator for combining the fixed and PTAT currents and forming first and second temperature compensated currents, a current control circuit for modifying said first and second temperature compensated currents in response to signals representing the characteristics of a load device and a driver circuit for amplifying and supplying a selected one of said first and second temperature compensated currents to said load device. Also disclosed is a method of supplying a precisely controlled current by generating a constant current and a current proportional to absolute temperature (PTAT), combining these two currents and providing temperature compensated currents, modifying the temperature compensated currents with a programmed reference signal and supplying a precisely controlled current to a load device.

Current driver and method of precisely controlling output current

Disclosed is a four stage transimpedance amplifier having a grounded base transistor preamplifier input stage, a common emitter voltage amplifier stage, and an amplifier stage having a common collector transistor, an output buffer stage, and a bias circuit coupled to the preamplifier stage to prevent the grounded base transistor from going into saturation.

Transimpedance amplifier and circuit including the same

A system for coupling optoelectronic devices, associated electrical components, and optical fibers is described. The system includes a substrate to which optoelectronic devices and at least some of the associated electronic components are formed on or formed using the substrate material. The substrate is further configured to receive and attach to one or more optical fibers. The system can be used to form transceivers for multiplexing and/or demultiplexing electronic information.

Optical interconnect structure, system and transceiver including the structure, and method of forming the same

An improved optical interconnect structure, system including the structure, and method of forming the structure and system are disclosed. The optical interconnect structure includes a waveguide and a reflective structure. Either the waveguide, the reflective structure, or both include a curved surface to facilitate focusing of light transmitted between the waveguide and an optoelectronic device.

Growing community of inventors

Fountain Hills, AZ, United States of America

C Phillip McClay