ipcalculus - planar transformer patenting activity
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8/6/2019 IPCalculus - Planar Transformer Patenting Activity
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Patenting activity in Planar Transformer
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Contents
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Over view
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Historically, the capabilities and size of transformer units were limited by the
frequency that the switching transistors were able to operate at, 20kHZ being
the best one could expect. However, MOSFETs smashed this barrier apart,offering switching frequencies in excess of 250kHZ. Thus the limiting step of low
switching frequencies had been removed from transformer design. This in turn
was now replaced by the next limiting step: namely the physical design of
the traditional µwire-wound¶ transformer itself .
It is Planar transformers that overcome this new limiting step, resolving many
of the problems of traditional wire-wound transformers and provide significant
reductions in the size and weight, improved efficiencies and much simpler
manufacturing methods.The name planar implies that the geometry of these transformers is more of a
two-dimensional component, rather than the traditional three-dimensional wire-
wound equivalents. Planar technology comprises two major design features
that distinguish it from the old-fashioned µwire-wound¶ transformers:
1. The windings are replaced by flat copper foil lead frames and can even be
embedded into a printed circuit board
2. These flat windings are then mounted between thin, very lightweight, ferrite
cores
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Technology classification
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Patent distribution by top Assignee
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Geographical patent distribution
Geographical patent distribution with Country code, patent count and percentage
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Patent distribution by top IPC class
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Patent distribution by top US class
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Patent distribution by top ECL A class
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Patent distribution by Application year
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Patent distribution by Publication year
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Patent distribution by Priority year
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Issued and Published Patent Distribution
by Application year
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Issued and Published Patent Distribution
by Publication year
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Issued and Published Patent Distribution
by Priority year
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