A Novel Design Method of Highly Efficient Saturated Power Amplifier Based On Self-Generated Harmonic Currents


A novel design method without requiring the special harmonic termination circuit for a highly efficient power amplifier (PA) is proposed. The proposed PA is driven into saturated operation, from the linear to knee region, by adjusting the only fundamental load, and the saturated operation induces self-generated harmonic currents. The current and voltage waveforms can be shaped easily by the har... » read more

DC Bus Switching Performance as Determined by Commutation Loop Parasitics and Switching Dynamics


In this article a 250 kW all-SiC inverter evaluation kit designed around low-inductance, high-speed power modules is used to demonstrate the DC bus switching performance resulting from the interaction among commutation loop parasitics and the switching dynamics. The interplay among the DC bus structure parasitics and near-RF switching dynamics can be quantified in both the time and frequency do... » read more

Inspection, Metrology Challenges Grow For SiC


Inspection and metrology are becoming more critical in the silicon carbide (SiC) industry amid a pressing need to find problematic defects in current and future SiC devices. Finding defects always has been a challenging task for SiC devices. But it’s becoming more imperative to find killer defects and reduce them as SiC device vendors begin to expand their production for the next wave of a... » read more

SiC Demand Growing Faster Than Supply


The silicon carbide (SiC) industry is in the midst of a major expansion campaign, but suppliers are struggling to meet potential demand for SiC power devices and wafers in the market. In just one example of the expansion efforts, Cree plans to invest up to $1 billion to increase its SiC fab and wafer capacities. As part of the plan, Cree is developing the world’s first 200mm (8-inch) SiC f... » read more

Week In Review: Manufacturing, Test


Market research In terms of overall IC sales, Intel has replaced Samsung as the number one quarterly semiconductor supplier in 4Q18 after losing the lead spot to Samsung in 2Q17, according to IC Insights. “While Samsung held the full-year number one ranking in 2017 and 2018, Intel is forecast to easily recapture the number one ranking for the full-year of 2019, a position it previously held ... » read more

Week In Review: Manufacturing, Test


Trade More trade news: "The Trump administration is hiking duties on $200 billion worth of Chinese products to 25% from 10%," according to CNBC. The following is attributed to Gary Shapiro, president and CEO of the Consumer Technology Association (CTA), in response to President Trump’s plan to increase tariffs on $200 billion worth of Chinese imports to 25%: “The president is seeking a bet... » read more

Week In Review: Manufacturing, Test


Chipmakers Cree posted its results for the third quarter of fiscal 2019 ended March 31. Revenue from continuing operations was $274 million, a 22% increase compared to revenue from continuing operations of $225 million in the like period a year ago. As previously announced, Cree executed a definitive agreement to sell its Lighting Products business to IDEAL. As a result, Cree’s Wolfspeed ... » read more

Make Your Own Energy


Regenerative braking and other forms of energy capture are becoming more popular and increasingly effective. What started as a way of increasing the range of electric or hybrid vehicles is now being applied to everything from green buildings to industrial robots. The automotive industry is still the main driver of this technology. The idea that braking can generate energy has been around for... » read more

Electric Cars Gain Traction, But Challenges Remain


Battery-powered electric vehicles are expected to reach a milestone in terms of shipments in 2019, but the technology faces several significant hurdles to gain wider adoption in the market. Limited driving range, high costs, battery issues, and a spotty charging infrastructure are the main challenges for battery electric vehicles (BEVs). In addition, there are issues with various power semic... » read more

Accelerating Adoption of SiC Power


The market has heard for many years about wide bandgap product roadmaps and concepts, touting that many possibilities could be available. However, you can’t design in a PowerPoint presentation or a preliminary datasheet, so this article will reinforce that Wolfspeed SiC power has moved way beyond any hype, talk, and fake news and has pioneered the widespread adoption of silicon carbide power ... » read more

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