Infineon Technologies Ag

Marius-Georghe Neag

Istvan Kovacs

Alina-Teodora Cirlescu

Paul-Nutu Miresan

Cristian-Valentin Raducan

A current sense circuit may comprise a first circuit node and a second circuit node configured to be coupled to a first terminal and a second terminal of a current sense resistor, respectively; differential amplifier including a first input and a second input which are coupled to the first circuit node and the second circuit node via a first input resistor and a second input resistor; a voltage source, configured to set the voltage at the first input of the differential amplifier; and a controllable current mirror configured to sink or source a first current in its input branch based on one or more outputs of the differential amplifier and to generate a corresponding second current in its output branch. The input branch is coupled to the second input of the differential amplifier. A biasing circuit is coupled to the controllable current mirror.

Current sense circuit including a controllable current mirror and a biasing circuit

In accordance with one embodiment, a voltage regulator includes a transistor having a load current path connecting an input node with an output node, wherein the input node is configured to receive an input voltage and the output node is configured to provide an output voltage. The voltage regulator further includes a main control loop coupled between the output node and a control electrode of the transistor and configured to control a voltage applied to the control electrode so that the output voltage matches a set-point. Furthermore, the voltage regulator includes a supplemental control loop that is coupled between the output node and the control electrode of the transistor and configured to detect a transient in the output voltage and to adjust the voltage applied to the control electrode in response to the detection of a transient. A corresponding method is described.

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Cluj-Napoca, Romania

Marius-Georghe Neag