Ams Ag

Austriamicrosystems Ag

Gilbert Promitzer

Gregor Schatzberger

Andreas Hartberger

Peter Rust

Peter Boesmueller

Driving circuit comprises a first input, at which a first supply voltage is present, a second input, at which a second supply voltage is present, a first current supply unit selectively coupled to first or second input as function of at least one first control signal, at least one second current supply unit selectively coupled to first or second input as function of at least one second control signal, a control unit connected to first current supply unit and to at least one second current supply unit for respective control thereof and designed to provide at least one first and second control signal, and a first output coupled to first current supply unit to provide a first current for at least one first light-emitting diode, at least one second output coupled to at least one second current supply unit to provide second current for at least one second light-emitting diode.

Driver circuit for light-emitting diodes and method

In one embodiment, the current source arrangement comprises a current source (B), that has two output terminals () and a control input () to be supplied with a control voltage (Vgs) and is set up to provide a current (I) as a function of a voltage (Vds) at the output terminals () and the control voltage (Vgs), an operating point adjustment unit (E) that is supplied with an actual value (Vi) proportional to an actual value of the current (I) and is set up to provide the control voltage (Vgs) as a function of the actual value (Vi) and a predetermined target value (Iz) of the current (I), and a comparison unit (A) coupled to the control input () of the current source (B) for providing a monitoring signal (), wherein the monitoring signal () is provided as a function of a predetermined limit voltage (VG) and the control voltage (Vgs). A method for operating a current source arrangement is also specified.

Current source arrangement, circuit arrangement with the current source arrangement and method for operating such an arrangement

An analogue/digital converter arrangement and a method. A differential input voltage is converted by means of a differentially implemented capacitative voltage divider that comprises two programmable capacitor banks (), and with the aid of the comparator () into a digital output signal.

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Mureck, Austria

Gilbert Promitzer