US PATENT SUBCLASS 257 / 119
.~ Bidirectional rectifier with control electrode (gate) (e.g., Triac)

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

107  DF  REGENERATIVE TYPE SWITCHING DEVICE (E.G., SCR, COMFET, THYRISTOR) {19}
119.~ Bidirectional rectifier with control electrode (gate) (e.g., Triac) {9}
120  DF  .~.~> Six or more semiconductor layers of alternating conductivity types (e.g., npnpnpn structure)
121  DF  .~.~> With diode or transistor in reverse path
122  DF  .~.~> Lateral
123  DF  .~.~> With trigger signal amplification (e.g., amplified gate)
124  DF  .~.~> Combined with field effect transistor structure {1}
126  DF  .~.~> With means to separate a device into sections having different conductive polarity {1}
128  DF  .~.~> Having overlapping sections of different conductive polarity
129  DF  .~.~> With means to increase reverse breakdown voltage
130  DF  .~.~> Switching speed enhancement means {1}

DEFINITION

Classification: 257/119

Bidirectional rectifier with control electrode (gate) (e.g., Triac):

(under subclass 107) Subject matter wherein the regenerative switching device has a control electrode, can conduct in both forward and reverse directions, and can be triggered into conduction by a pulse applied to its control electrode.

SEE OR SEARCH THIS CLASS, SUBCLASS:

110, for bidirectional rectifiers with no control electrode.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems,

240, and 325 for circuit having unidirectional elements with bidirectional pass.