US PATENT SUBCLASS 323 / 326
.~.~.~ Including ramp generator or controlled capacitor charging

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}
325  DF  .~.~ With a three or more terminal semiconductive device in trigger circuit {1}
326.~.~.~ Including ramp generator or controlled capacitor charging

DEFINITION

Classification: 323/326

Including ramp generator or controlled capacitor charging:

(under subclass 325) Subject matter including circuitry which produces a gradually changing signal (usually by controlling the rate of charge of a capacitor) which is then used in the trigger circuit to produce the controlling input to the final control element.

(1) Note. The changing signal may take the form of a sawtooth with a repeating ramp and return to an initial value. Controlled capacitor charging involves charging a capacitor to some predetermined value at which value a controllable device such as a transistor, unijunction transistor, or programmable unijunction transistor goes into another state of conduction or exerts a controlling influence on another device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

242, and 288, for ramp generators used in output level responsive systems.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

131+, for a miscellaneous ramp or sawtooth waveform generator.