tag: Wolfspeed

Week In Review: Manufacturing, Test
By Mark LaPedus - 08 Oct, 2021 - Comments: 0

Government policy Hoping to resolve the ongoing worldwide chip shortage situation, the U.S. Department of Commerce late last month launched a “request for information (RFI)” initiative, which involved sending questionnaires to various semiconductor companies. The U.S. government is asking all parts of the supply chain – producers, consumers, and intermediaries – to voluntarily share in... » read more

Week In Review: Auto, Security, Pervasive Computing
By Susan Rambo - 08 Oct, 2021 - Comments: 0

Automotive Qualcomm and SSW Partners, an investment partnership, now have a definitive agreement to acquire advanced driver assistance systems (ADAS) company Veoneer for $37.00 per share in an all-cash transaction that equals $4.5 billion in equity value. A few months ago, Qualcomm made the proposal to Veoneer after the company already had an agreement in place with Magma, a 60-year-old automo... » read more

Power Amp Wars Begin For 5G
By Mark LaPedus - 24 Aug, 2020 - Comments: 2

Demand is increasing for power amplifier chips and other RF devices for 5G base stations, setting the stage for a showdown among different companies and technologies. The power amplifier device is a key component that boosts the RF power signals in base stations. It's based on two competitive technologies, silicon-based LDMOS or RF gallium nitride (GaN). GaN, a III-V technology, outperforms ... » read more

Beyond-Line-Of-Sight Troposcatter Communications Primer
By Kasyap Patel - 16 Jul, 2020 - Comments: 0

Though tropospheric scatter (troposcatter, or tropo) communications technology has existed since the 1950s and was used by the U.S. military from 1960 to 2002, this legacy technology is being revitalized in the wake of concerns around the reliability of tactical satellite communications (Satcom). For several decades, satellites were a reliable and secure method of communications that provided s... » read more

Generalized Class-E Power Amplifier With Shunt Capacitance And Shunt Filter
By Various Writers - 16 Jul, 2020 - Comments: 0

This paper presents a generalized analysis of the Class-E power amplifier (PA) with a shunt capacitance and a shunt filter, leading to a revelation of a unique design flexibility that can be exploited either to extend the maximum operating frequency of the PA or to allow the use of larger active devices with higher power handling capability. The proposed PA fulfills zero voltage switching (ZVS)... » read more

Week In Review: Manufacturing, Test
By Mark LaPedus - 02 Jul, 2020 - Comments: 0

Fab tools, packaging/test VLSI Research has released its 200mm wafer fab equipment (WFE) market share figures for 2019. The top three suppliers--Applied Materials, TEL, and ASML—saw growth in the 2019 200mm WFE business. Lam Research was in fourth place, followed by KLA and Canon. In total, 200mm wafer fab equipment sales were $3.6 billion in 2019, declining 5% from 2018, according to the fi... » read more

Improving Reliability For GaN And SiC
By Mark LaPedus - 18 Jun, 2020 - Comments: 2

Suppliers of gallium nitride (GaN) and silicon carbide (SiC) power devices are rolling out the next wave of products with some new and impressive specs. But before these devices are incorporated in systems, they must prove to be reliable. As with previous products, suppliers are quick to point out that the new devices are reliable, although there are some issues that can occasionally surface... » read more

RF And Microwave Solid-State Power Amplifiers Design Is A Speciality
By Wolfspeed, a Cree Company - 17 Jun, 2020 - Comments: 1

In the world of RF and microwave engineering, the design and development of solid-state amplifiers is a specialty. It has always required many years of specialized engineering experience and a suitable collection of test and measurement equipment. While these will always be necessary, to be successful in the marketplace today, it is also essential to use a combination of specialized and general... » read more

Latest IC Outlook: More Uncertainty
By Mark LaPedus - 26 May, 2020 - Comments: 0

So far in 2020, it’s been a difficult period in the semiconductor industry amid the Covid-19 pandemic outbreak and other issues. And heading into the second half of 2020, the industry faces more challenges, if not uncertainty, in the market. Many segments in the semiconductor industry face some headwinds, but there might be some positive news in the equipment business. To be sure,... » read more

High-Performance 300 kW 3-Phase SiC Inverter Based On Next Generation Modular SiC Power Modules
By Wolfspeed, a Cree Company - 21 May, 2020 - Comments: 0

Wolfspeed presents a new high-performance, low-cost, compact 3-phase inverter based on next generation power modules which are specifically optimized to fully utilize Wolfspeed’s third generation of silicon carbide (SiC) MOSFETs. The inverter was designed with a holistic approach with careful consideration of module specifications, busbar technology, DC link capacitors, and a high-performance... » read more

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