(under subclass 21) Subject matter having a circuit to reduce the possibility of switching due to noise input instead of signal input.
(1) Note. An example of reducing noise in the time domain is using a low pass filter at the input to filter out high frequency noise.
(2) Note. An example of reducing noise in the amplitude domain is using a Schmitt trigger which uses a feedback mechanism to eliminate noise.
SEE OR SEARCH CLASS
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
72+, for an input signal compared to reference derived therefrom, subclasses 74+ for an input signal compared to plural fixed references, and subclasses 205+ for miscellaneous hysteresis circuits (including a Schmitt trigger).
