Patent ID: 7511541

Claim:
Electronic driver device for an external load comprising an input to which an input signal is applied and an output that produces an output signal to the external load, wherein the electronic driver device comprises means of reducing dependence of the slew rate of the output signal on the external load capacitance, said means of reducing dependence of the output signal slew rate on the capacitance of the external load include: a programmable ramp generator comprising at least one input to which said input signal is applied, said ramp generator outputting a signal output by the ramp generator, and retroactive means of processing the output signal comprising means of amplifying a value corresponding to a difference in amplitude between the output signal and said signal output by the ramp generator, said retroactive means approximately equalizing the output signal and said signal output by the ramp generator, said amplification means including at least one first differential amplifier comprising P type transistors and a second differential amplifier comprising N type transistors, and wherein first and second differential pairs of said first and second amplifiers respectively are connected to: first and third static current sources and second and fourth current sources controlled by first and second dynamic signals, respectively, generated by means of generating dynamic signals, and wherein, when the difference in amplitude between the output signal and the signal output by the ramp generator is greater than a first predetermined threshold, the first and second dynamic signals are equal to first and second values respectively to reduce the response time of the amplification means.