Patent ID: 8093858

Claim:
An in-line voltage regulation circuit capable of responding to changes in quality of an AC input line power to apply an adjusted AC voltage level to an AC load device, the AC load device having first and second AC terminals; the voltage regulation circuit comprising: means for connecting to a source of said single-phase AC line power, having a first AC power conductor and a second AC power conductor; a two-input line voltage regulator having first and second AC power terminals, the first AC power terminal being connected to the first AC power conductor, the second AC power terminal being connected to the first AC power terminal of said load, and the second AC terminal of the load being connected to the second AC power conductor; a control signal generator including sensor inputs coupled to said AC power, and means to detect AC voltage level of said AC input line power, means to detect zero crossings of said AC line power, and first and second outputs providing first and second control signals to said line voltage regulator.