Abstract: An optoelectronic circuit comprising including_a first power supply terminal and a second reference terminal the first power supply terminal and the second reference terminal being intended to be connected to a voltage source that delivers, to the optoelectronic circuit, a variable voltage containing alternating increasing positive phases and decreasing positive phases. The optoelectronic circuit includes: sets of light-emitting diodes, the sets being connected to one another in series; conduction components wherein each conduction component is associated with only one of the sets of light emitting diodes; connecting circuits, and a control circuit having a differential amplifier and the same number of output stages as there are conduction components in the optoelectronic circuit.

Abstract: The invention concerns an amplifier circuit comprising: an amplifier having a first input coupled to an input node of the amplifier circuit via a first resistor and an output coupled to a load via a coupling capacitor, the output being coupled to the first input via a second resistor; and a current ramp generator adapted to supply a current ramp to the first input of the amplifier during a power up phase or power down phase of the amplifier circuit to control the rate of charge or discharge of the coupling capacitor.

Abstract: The invention concerns an amplifier circuit comprising: an amplifier having a first input coupled to an input node of the amplifier circuit via a first resistor and an output coupled to a load via a coupling capacitor, the output being coupled to the first input via a second resistor; and a current ramp generator adapted to supply a current ramp to the first input of the amplifier during a power up phase or power down phase of the amplifier circuit to control the rate of charge or discharge of the coupling capacitor.