US PATENT SUBCLASS 323 / 327
.~.~ With passive element only in trigger circuit

Current as of: June, 1999
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323 /   HD   ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS

318  DF  EXTERNAL OR OPERATOR CONTROLLED {5}
320  DF  .~ Phase controlled switching using electronic tube or a three or more terminal semiconductive device {6}
327.~.~ With passive element only in trigger circuit

DEFINITION

Classification: 323/327

With passive element only in trigger circuit:

(under subclass 320) Subject matter including a control signal shaping circuit between the controlling input and the final control element, the shaping circuit including passive elements such as resistors and capacitors only.