US PATENT SUBCLASS 327 / 172
.~ Rectangular (e.g., clock, etc.) or pulse waveform width control

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

100  DF  SIGNAL CONVERTING, SHAPING, OR GENERATING {29}
172.~ Rectangular (e.g., clock, etc.) or pulse waveform width control {5}
173  DF  .~.~> Pulse narrowing
174  DF  .~.~> Pulse broadening
175  DF  .~.~> Duty cycle control
176  DF  .~.~> Having digital device (e.g., logic gate, flip-flop, etc.)
177  DF  .~.~> Having inductive device (e.g., transformer, etc.)

DEFINITION

Classification: 327/172

Rectangular (e.g., clock, etc.) or pulse waveform width control:

(under subclass 100) Subject matter including maintaining constant or varying the length of individual pulses in a pulsating waveform which is repetitive or intermittent and wherein an individual pulse has negligible transition times.

SEE OR SEARCH THIS CLASS, SUBCLASS:

31+, for pulse width discriminating without subsequent control.

398, for delay controlled switching with predetermined activation time.

SEE OR SEARCH CLASS

332, Modulators,

109+, for modulation of pulse width by an intelligence signal.

375, Pulse or Digital Communications, 22, for communication systems using pulse width modulation.