Patent ID: 8004206

Claim:
An electrical circuit, comprising: a controller configured to: generate a first pulse-width modulated inverter switch control signal with a first duty cycle and generate a current control signal, wherein the current control signal is configured to control current flow through a fluorescent lamp in a fluorescent lamp array; and generate a second pulse-width modulated inverter switch control signal with a second duty cycle that is different than the first duty cycle; and an inverter bridge driver coupled to the controller, wherein the inverter bridge driver is configured to: generate a first switching signal for a first inverter bridge based on the first pulse-width modulated inverter switch control signal and thereby generate a first inverter voltage with a magnitude based on the first duty cycle; and generate a second switching signal for a second inverter bridge based on the second pulse-width modulated inverter switch control signal and thereby generate a second inverter voltage with a magnitude based on the second duty cycle.