A. Borjak

High-speed generalized distributed-amplifier-based transversal-filter topology for optical communication systems

The use of a distributed-amplifier-based transversal filter as a signal processor for high-rate pulse shaping/filtering is discussed. By showing the analogy between transversal filters and distributed-amplifier topologies, schemes demonstrating practical approaches for the design of such filters are explored. The practicability of one of the different schemes is illustrated via an implemented design. A four-stage 10-Gb/s distributed-amplifier monolithic microwave integrated circuit (MMIC) is constructed using one of the developed schemes and its behavior is discussed.

10-Gb/s pulse-shaping distributed-based transversal filter front-end for optical soliton receivers

The design and performance of a microwave filter as a signal processor for a 10-Gb/s soliton receiver are described. The work reports, for the first time, a versatile transversal active filtering structure, implemented as a monolithic microwave integrated circuit (MMIC) and featuring an accurate, yet straightforward, response tuning facility based on DC bias variation and allowing for optimization of the received eye patterns and therefore error-rate minimization. Tests are reported for 10-Gb/s input optical solitons, showing the efficacy of receiver output eye shape variation using the techniques described.

A distributed optical receiver preamplifier with unequal gate/drain impedances

A near DC to 16.4 GHz wide band distributed amplifier, constructed using a 20 GHz MMIC GaAs process and optimised to operate as an optical receiver front end preamplifier, has been designed, realised and tested at 10 Gbit/s. The design uses a 75 /spl Omega/ gate line impedance to maximise the overall transimpedance gain without introducing severe bandwidth restriction.<<ETX>>A near dc to 16.4 GHz wide band distributed amplifier, constructed using a 20 GHz MMIC GaAs process and optimised to operate as an optical receiver front end preamplifier, has been designed, realised and tested at 10 Gbit/s. The design uses a 75 /spl Omega/ gate line impedance to maximise the overall transimpedance gain without introducing severe bandwidth restriction.<<ETX>>

Pulse shaping distributed based transversal filter for optical soliton system

The design of a microwave filter as a signal processor for 10 Gbit/s optical soliton receiver is described. The filter is based on a transversal structure and designed as a GaAs MMIC with advantages of gain, electrical tunability and ability to produce link length tolerant optical receivers with optimised performance.

The distributed amplifier as a signal processor for very high speed communication systems

This paper discusses the use of distributed amplifier based transversal filter as a signal processor for high rate pulse shaping/filtering. Two schemes demonstrating practical approaches for the design of such filters are explored. Simulation results, based on the parameters of a commercially available 40 GHz HEMT foundry process, are presented to illustrate the practicability of the different schemes. A 40 GHz 4-stage distributed amplifier MMIC is constructed using one of the developed schemes and its performance is discussed.

Distributed amplifiers with embedded signal shaping for multigigabit transmission systems

This paper discusses the use of distributed amplifiers as transversal filters for high bit rate pulse shaping/filtering applications. Two schemes demonstrating a general approach, obtained by optimising one or more transversal filter parameters are explored. Simulation results, based on the parameters of a commercially available 40 GHz HEMT foundry process, are presented to illustrate the practicability of the different schemes.