Circuit arrangement for preventing high current flow during energy-saving mode
AssigneeInfineon Technologies AG
InventorsThomas Kuenemund, Artur Wroblewski
Life of this patent
Estimating the term…
Abstract
In accordance with one embodiment, a circuit arrangement is provided including a circuit having a first terminal for a first supply potential and a second terminal for a second supply potential, wherein the first terminal is coupled to the first supply potential; a switch, by means of which the second terminal can be coupled to the second supply potential; a voltage source coupled to the second terminal; and a control device designed to open the switch in reaction to receiving a turn-off signal in an operating mode in which the switch is closed, and subsequently to control the voltage source in such a way that it varies the potential of the second terminal in the direction of the first supply potential.
Claims15
A circuit arrangement comprising:
- a circuit having a first terminal for a first supply potential and a second terminal for a second supply potential, wherein the first terminal is coupled to the first supply potential;
- a switch, by means of which the second terminal can be coupled to the second supply potential;
- a voltage source coupled to the second terminal;
- and
- a control device designed to open the switch in reaction to receiving a turn-off signal in an operating mode in which the switch is closed, and subsequently to control the voltage source in such a way that it varies the potential of the second terminal in the direction of the first supply potential,
- wherein the first supply potential is a high supply potential and the second supply potential is a low supply potential,
- wherein the voltage source varies the potential of the second terminal in the direction of the first supply potential by feeding current to the second terminal current in addition to a total current which flows from the first supply potential through the circuit to the second terminal, and
- wherein the control device controls the voltage source in such a way that the current fed to the second terminal by the voltage source does not exceed an adjustably set maximum value and so that a voltage of the voltage source is increased to a voltage of the first supply potential within a predefined period of time.
A circuit arrangement comprising:
- a circuit having a first terminal for a first supply potential and a second terminal for a second supply potential, wherein the first terminal is coupled to the first supply potential;
- a switch to selectively couple the second terminal to the second supply potential;
- a voltage source coupled to the second terminal;
- and
- a control device designed to open the switch in reaction to receiving a turn-off signal in an operating mode in which the switch is closed, and subsequently to control the voltage source in such a way that it varies the potential of the second terminal in the direction of the first supply potential,
- wherein the first supply potential is a high supply potential and the second supply potential is a low supply potential,
- wherein the voltage source varies the potential of the second terminal in the direction of the first supply potential by feeding current to the second terminal,
- wherein the voltage source is designed to feed to the second terminal current which is greater than a total current which flows from the first supply potential through the circuit to the second terminal, and
- wherein the control device controls the voltage source in such a way that the current fed to the second terminal by the voltage source does not exceed an adjustably set maximum value and so that a voltage of the voltage source is increased to a voltage of the first supply potential within a predefined period of time.
Dependencies are inferred from the claim text.