Patent ID: 9681526
Date: 2017-06-13
CPC Classifications: H05B

Claim:
1. A dimmer circuit comprising: a switch for controlling delivery of power of an AC power source to a load, the dimmer circuit having an input line voltage terminal and a load terminal, the load terminal coupled to the input line voltage terminal by the switch; wherein the dimmer circuit is operative, during a conducting phase of the switch, to monitor a first voltage across the input line voltage terminal and the load terminal to detect a change in state of the switch from an ON state to an OFF state; wherein based on the change in state being detected, the dimmer circuit is operative to cause the switch to return to an ON state; wherein the dimmer circuit is operative, during a first half cycle of an input line voltage, to store a timing parameter, wherein the dimmer circuit is operative to utilize the timing parameter for firing the switch during a second half cycle of the input line voltage, the second half cycle being subsequent to the first half cycle; and wherein the timing parameter is a time difference between an initial firing time of the switch during the first half cycle of the input line voltage and a firing time of the switch during the first half cycle of the input line voltage based on the change in state.