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US 10,700,216 B2Granted
Bidirectional bipolar-mode JFET driver circuitry
AssigneeJohn Wood
InventorJohn Wood
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Abstract
Rectifiers are used in power systems, but surges are commonly encountered in the power grid, which can damage switches used to drive the active rectifiers. An active rectification system is proposed in which a ‘thyristor’ type path is enabled through a transistor device such that surges bypass the driving switches.
Claims5
A transistor structure, comprising:
- a base region of a first conductivity type, wherein said base region constitutes a drift region of said structure;
- a base connection of a second conductivity type, wherein said base connection is highly doped relative to said base region;
- first and second collector/emitter regions adjacent opposite ends of said base region, each of the first and second collector/emitter regions being of the first conductivity type;
- wherein said base region is lightly doped relative to said collector/emitter regions;
- the first collector/emitter region formed within or adjacent to said base connection;
- and
- an electrode region of the second conductivity type, wherein said electrode region is highly doped relative to the base region, the electrode region formed within said first collector/emitter region;
- wherein said base connection has a greater thickness than the first collector/emitter region.
5 more elements
Dependencies are inferred from the claim text.