A5035354359- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Radio Frequency Integrated Circuit Design
- Particle Detector Development and Performance
- Optical Network Technologies
- Microwave Engineering and Waveguides
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Semiconductor Quantum Structures and Devices
- Radiation Effects in Electronics
- Particle Accelerators and Free-Electron Lasers
- Supercapacitor Materials and Fabrication
- Parallel Computing and Optimization Techniques
- Advanced Data Storage Technologies
- Advancements in PLL and VCO Technologies
- VLSI and Analog Circuit Testing
- Integrated Circuits and Semiconductor Failure Analysis
- Low-power high-performance VLSI design
- Silicon and Solar Cell Technologies
European Organization for Nuclear Research
1995-2002
Bangor University
1991-2002
University of Manchester
1995
The APV25 is a chip designed for readout of silicon microstrips in the CMS tracker at CERN Large Hadron Collider. It first major high energy physics experiment to exploit modern commercial 0.25 /spl mu/m CMOS technology. Experimental characterisation circuit shows excellent performance before and after irradiation. Automated probe testing many chips has demonstrated very yield. A summary design, detailed results from measurements, are presented.
Abstract Graphene and its composites have attracted much attention for applications in energy storage systems. However, the toxic solvents required exfoliation process hampered exploitation of properties. In this work, graphene dispersions are obtained via liquid phase (LPE) graphite cyrene, an environmentally friendly solvent with solubility parameters similar to those N-methyl-2-pirrolidone (NMP). The a concentration 0.2 mg/mL comprised multilayered sheets lateral sizes hundreds...
A novel technique is presented for using the distributed amplifier (DA) as an active pulse shaping/filtering network by effectively constructing a transversal filter. This versatile, and judicious selection of effective stage delays gains allows variety filtering functions to be implemented. The capability illustrated with reference GaAs MMIC design 10 Gbit/s.
A near dc to 16.4 GHz wide band distributed amplifier, constructed using a 20 MMIC GaAs process and optimised operate as an optical receiver front end preamplifier, has been designed, realised tested at 10 Gbit/s. The design uses 75 /spl Omega/ gate line impedance maximise the overall transimpedance gain without introducing severe bandwidth restriction.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
In the CMS central tracker, LHC clock and first level trigger decisions are distributed encoded as a single signal. This paper describes an ASIC for recovery decoding to be used in tracker data acquisition slow control systems. The IC was implemented 0.25 Pm CMOS technology using rad-tolerant layout. It recovers signals meeting power budget radiation hardness constraints. design of this self-calibration techniques adopted accommodate process parameters spread device parameter changes due...
Optical fibre is now the dominant carrier of telecommunication traffic, and there a continuing trend to higher bit rates in interest minimising transport costs. Statistical techniques that allow rigorous design receivers offer optimum performance have been developed. These already implemented at low moderate using both lumped-element microstrip. At high rates, monolithic microwave integrated circuit (MMIC) based approach appears attractive. Through EUROCHIP initiative, authors gained access...
The design and optimization of integrated post detection optical receiver filters are discussed. A novel time domain based technique accounting for process degeneracies is presented along with practical results a 15-Gb/s GaAs MMIC pulse shaping network, demonstrating the suitability designing structures well-controlled response to frequencies beyond 20 GHz.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
LHC experiments will make use of thousands serial links in order to transfer digital data from the electronics sitting detectors off detector located more than 100 meters away. Due high levels radiation present detectors, CERN designed and developed a hard serialiser, Gigabit Optical Link (GOL) chip[1]. On other hand, off-detector process received heavily rely on commercial programmable components like Field Programmable Gate Arrays. Commercial be used de-serialize detector’s prior...
This paper describes a range of methods, developed at the University Wales, that affect signal shaping for high bit rate optical communications. All designs presented here aim to offer optimum performance in terms receiver sensitivity broad system impairments and are also designed be tolerant variations these impairments. makes filters ideally suited use applications where actual cannot accurately specified. The described particularly appropriate systems dominated by dependent noise such as...
A tuned SCM optical receiver, integrated with a serial tuning element as GaAs MMIC, is reported. The receiver designed for specific system application and optimized to operate over the range 1.8 2.2 GHz. Predicted results indicate low noise high gain performance verify validity of design technique adopted.
A tuned SCM optical receiver design integrated as a GaAs MMIC is reported. The intended for use in practical system and includes an noise tuning network. critical study of networks suitable integration undertaken, the details novel optimisation strategy such are discussed. Simulation results predict low high gain performance, verify validity technique adopted.