Infineon Technologies Ag

Dragos Vocurek

Mario Motz

Hans-Joerg Wagner

Stephan Leisenheimer

Severin Neuner

Rainer Kling

Yongjia Li

Andrei-George Roman

Gabriel Bonteanu

Monika Pfeifer

A chopper amplifier circuit includes a modulator circuit tuned to a chopper frequency, the modulator circuit being configured, in accordance with the chopper frequency, to convert a voltage into an AC voltage; an amplifier circuit having an inverting input and a non-inverting input for the AC voltage, and having an inverting output and a non-inverting output for providing an amplified AC voltage; and a demodulator circuit tuned to the chopper frequency, the demodulator circuit being configured to convert the amplified AC voltage into an amplified DC voltage. The demodulator circuit is configured to, during different switching phases, couple each of the inverting and non-inverting outputs of the amplifier circuit, both directly and capacitively, to each inverting and non-inverting input of a summing circuit.

Chopper amplifier circuits and method for operating chopper amplifier circuits

A rotational angle sensor device and a corresponding method are provided. Two signals which have a phase offset with respect to one another are generated based on a modulated magnetic field using a sensor arrangement. Three signals which have a phase offset with respect to one another are generated from the signals.

Rotational angle sensor device and method for determining a rotational angle, and control device for an electric motor

Sensor devices and corresponding methods are provided. When a signal path output (COMP OUT) indicates no threshold crossings, diagnosis is performed with a timing based on a clock. In case threshold crossings are indicated, diagnosis is performed with a timing based on threshold crossings.

Sensor device and method

An output circuit including an output transistor configured to provide an output signal; and a gate switch configured to decouple a gate of the output transistor from other components of the output circuit when there is a decrease in a supply voltage of the output circuit, wherein when the gate of the output transistor is decoupled, a charge at the gate is maintained in a capacitor inherent within the gate of the output transistor.

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Bucharest, Romania

Dragos Vocurek