Devialet

Mathias Moronvalle

Pierre-Emmanuel Calmel

The invention relates to a 'push-pull' amplifier, comprising an input () and an output (), which includes: a main amplification branch comprising two amplification transistors () connected in opposite series between two supply voltages (V+, V&#x2212;), the amplifier output () being connected between the two transistors (), and a control circuit () for each amplification transistor () connected to the input () to each receive as an input the signal to be amplified. The main amplification branch comprises, between each transistor () and the output (), a member having a nonlinear response () and means () for introducing at the input of the control circuit () of each transistor (), a nonlinear compensating signal suitable for bringing about the circulation of a minimum current in the member having a nonlinear response ().

Linear amplifier

The switched power supply () comprises: an input () for an AC input current (I) under an input voltage (V); an output () for a DC output current (I), and successively, from the input to the output, a system of controlled breaker switches (); a transformer () whereof the primary () is linked at the output of the system of controlled breaker switches (); a rectifying circuit () connected across the terminals of a secondary circuit () of the transformer; and a storage capacitor () linked in parallel across the output terminals of the rectifier circuit () with interposition of a coil (), the output () being formed across the terminals of the storage capacitor (). The system of controlled breaker switches () is the only circuit between the input () and the output () to comprise switching members and in that it comprises means () for controlling the system of breaker switches () so as to control the amplitude of the input current (I) as a function of the input voltage (V) of the output current (I) and of the voltage (V) across the terminals of the storage capacitor ().

Switched power supply

A current-voltage converter with a current reflector, for which the input current includes a fixed component and a variable component, includes an input for the current to be converted, an output for the converted voltage, two constant current sources each connected between the output and a respective reference voltage, at least one MOSFET transistor mounted in series with each constant current source, and a resistor for converting the current into a voltage, arranged between the output and ground. The gate of each MOSFET transistor is connected to one of the reference voltages. The input for the current to be converted is connected to the output through one of the MOSFET transistors. The converted further includes, for each MOSFET transistor, means for re-injecting into at least one of the current sources, a current equal to the current absorbed in the gates of the MOSFET transistors.

Growing community of inventors

Vauhallan, France

Mathias Moronvalle