Stephen Oliver

Stephen
Oliver
Vicor Corp., Power Design

Stephen Oliver, vice president of Vicor’s VI Chip Product Line, has been in the electronics industry for 18 years, with experience in applications engineering, product development, manufacturing, and strategic product marketing in the ac-dc, telecom, defense, processor power, and automotive markets. Previously with International Rectifier, Philips Electronics, and Motorola, he received a BSEE degree from Manchester University, the U.K., and an MBA in global strategy and marketing from UCLA. He holds several power electronics patents as well.

Articles
Rails for Rails
In the rail environment, two-stage architecture can address the challenges of wide voltage tolerance on unregulated dc distribution power, particularly for power subsystem designs that must provide multiple voltage rails to functional loads.
Optimize a Power Scheme for these Transient Times
A variety of mix-and-match modules allows designers to adapt to multiple energy sources and load requirements for power subsystem targeting pulsed-RF applications that demand high transient response to the load current waveform.
+48 Is The New –48
Tight tolerance +48-V (nominal) power distribution allows systems to qualify as SELV designs, reducing installation and operating costs. Narrow-range 48-V rails facilitate high-efficiency power converters to power line cards and processors.
Reversible Power Improves Versatility
Most system designs contemplate power flows in one direction only: from source to power-management blocks to loads. Some types of systems, however, benefit from power-management blocks capable of bi-directional power flow.
The Hard Facts On Soft Switching
For many, a good rule of thumb for switch-mode power designs has been that hard switching is easy, and soft switching is hard. Power-switching technology developments, however, give reason to switch thumbs.
Next-Generation Servers Require Robust Power Platforms
Market forces drive incremental data-access and computing costs down with increasing use. In server environments, this means that processing efficiencies and densities must increase throughout the system-design hierarchy, from core to cabinet and beyond to the data center infrastructure.
Tap Online Design Tools To Improve Your Power Subsystem Designs
Vendor-provided online design tools allow engineers to start developing and evaluating designs quickly, gaining critical insights into design alternatives and engineering tradeoffs, even in advance of sampling major power components.
Move Thermal Issues To The Front Of Your Design Cycle
An effective design must consider the big picture of power needs, thermal dissipation, and overall packaging, and do so early on.
400-V DC Power Transformation Saves Upfront “Green” Supply Costs 2
Vicor's Stephen Oliver makes the case for 400-V dc power as the first stage in power distribution in an intermediate bus architecture for telecommunications and the data center.
Take A Multifaceted Power Approach To Reduce Your UAV’s Weight
UAVs (Drones) have multiple power buses and a need to minimize weight, including in power management electronics. Vicor's Stephen Oliver considers alternative topologies.
High-Voltage Busing Makes Sense
There are two conflicting ways to increase power-distribution efficiency in data centers as electricity flows between the front-end voltage converter and the ICs on blade servers. One is to lower the bus voltages around the circuit board. The other i
Commentaries and Blogs
Guest Blogs
Jun 30, 2015
Commentary

Four-Wire Sensing Can Make or Break Your Measurements

Erroneously implementing four-wire sensing into a measurement instrument can be disastrous, so it becomes critical to have a firm grasp of how sense lines function....More
May 29, 2015
blog

Engineering Education: Fact and Fiction 4

I have taken a keen interest in the dialogue (that has been going on for many years) about the quality of engineering education in the U.S....More
May 1, 2015
blog

Transition from the Academe to the Industry Unraveled (Part 2) 4

Some few months ago, I wrote an article contrasting academe and work life as well as the adjustments and precautions that had to be made by a typical fresh graduate......More

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