Patent ID: 11871493
Assignee: LEVITON MANUFACTURING CO., INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 28:
29. The electrical load controller of claim 23, wherein the zero-crossings of the input AC waveform comprise positive-going zero-crossings of the input AC waveform and negative-going zero-crossings of the AC waveform, wherein the at least one time offset comprises:
a positive-going time offset representing amounts of time between (i) zero-crossings of the input signal waveform indicative of the positive-going zero-crossings of the input AC waveform and (ii) a first group of transitions of the corresponding transitions of the output signal from the output of the zero-crossing detector circuit, each transition of the first group of transitions indicating a respective positive-going zero-crossing of the input AC waveform; and
a negative-going time offset representing amounts of time between (i) zero-crossings of the input signal waveform indicative of the negative-going zero-crossings of the input AC waveform and (ii) a second group of transitions of the corresponding transitions of the output signal from the output of the zero-crossing detector circuit, each transition of the second group of transitions indicating a respective negative-going zero-crossing of the input AC waveform; and
wherein the adjusting the half-cycle time comprises determining an adjustment amount of time as a function of the positive-going time offset and the negative-going time offset, and adding the adjustment amount of time to, or subtracting the adjustment amount of time from, the determined half-cycle time.