Patent ID: 9137862
Filing Date: 2015-09-15
Classification: H03K,H05B,Y02B

Abstract:
1. An electronic circuit comprising: a slew rate controlled transistor driver circuit operable to drive a transistor and configured to generate a transistor driver signal that rises substantially in step fashion until reaching a first threshold voltage level, whereupon the transistor driver signal rises at a controlled slew rate, comprising a slew rate controlled gate driver circuit operable to drive a gate of a field effect transistor and configured to generate a gate control signal that rises substantially in step fashion until reaching a first threshold voltage level, whereupon the gate control signal rises at a controlled slew rate; further comprising an LED dimmer circuit comprising: a field effect transistor whose gate is coupled to receive the gate control signal from the slew rate controlled gate driver circuit; a light emitting diode whose anode is coupled to the drain of the field effect transistor and whose cathode is coupled to the source of the field effect transistor; and a current source coupled to supply current to the drain of the field effect transistor and the anode of the light emitting diode.