(FR2791443-A1)   NOVELTY - The regulator has an oscillator (110) generating a rectangular control signal (C) with a variable duty cycle, which changes to compensate supply (Valim) voltage fluctuation. The control signal operates on the gates of two transistors (Q1,Q2), which combine to shunt the load and to provide series regulation of current. An inductance (25) in series with the load (20) smoothes the current.    USE - Regulated supply to motor vehicle electrical equipment that is sensitive to supply voltage, particularly lighting    ADVANTAGE - Ensures that current passing through equipment is approximately constant, prolonging its life and in the case of headlamps ensuring that light output does not exceed statutory levels under over-voltage conditions.    (JP2000284837-A)   NOVELTY - The regulator has an oscillator (110) generating a rectangular control signal (C) with a variable duty cycle, which changes to compensate supply (Valim) voltage fluctuation. The control signal operates on the gates of two transistors (Q1,Q2), which combine to shunt the load and to provide series regulation of current. An inductance (25) in series with the load (20) smoothes the current.    USE - Regulated supply to motor vehicle electrical equipment that is sensitive to supply voltage, particularly lighting    ADVANTAGE - Ensures that current passing through equipment is approximately constant, prolonging its life and in the case of headlamps ensuring that light output does not exceed statutory levels under over-voltage conditions.    (US6204652-B1)   NOVELTY - The regulator has an oscillator (110) generating a rectangular control signal (C) with a variable duty cycle, which changes to compensate supply (Valim) voltage fluctuation. The control signal operates on the gates of two transistors (Q1,Q2), which combine to shunt the load and to provide series regulation of current. An inductance (25) in series with the load (20) smoothes the current.    USE - Regulated supply to motor vehicle electrical equipment that is sensitive to supply voltage, particularly lighting    ADVANTAGE - Ensures that current passing through equipment is approximately constant, prolonging its life and in the case of headlamps ensuring that light output does not exceed statutory levels under over-voltage conditions.