Method for activating a control device
AssigneeRobert Bosch GmbH
InventorsMartin Kaiser, Carsten Hermann, Ralph Bauer, Johannes Kunst
Life of this patent
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Abstract
A circuit arrangement for activating a control device includes: a first switch in a main current path, via which the control device is activated; an alternative current path; and a control logic which compares a voltage present for activating the control device to a threshold voltage and opens the first switch if the threshold voltage falls below so that a higher volume of an interference current effectuated by the present negative voltage flows via the alternative current path.
Claims15
A circuit arrangement for activating a control device, comprising:
- a first switch in a main current path that is closable to supply a voltage to activate the control device;
- an alternative current path;
- and
- a control logic, wherein the control logic is configured to open the first switch in response to the voltage falling below a predefined threshold so that a higher volume of an interference current effectuated by a present negative voltage flows via the alternative current path.
A circuit arrangement for activating a control device, the circuit arrangement comprising:
- a first switch in a main current path and via which the control device is activatable;
- an alternative current path;
- a control logic, wherein the control logic is configured to open the first switch in response to a voltage present for the activation of the control device falling below a predefined threshold so that a higher volume of an interference current effectuated by a present negative voltage flows via the alternative current path;
- and
- a diode in an application-specific integrated circuit (ASIC), wherein the first switch is external to the ASIC and is connected between a source of the voltage and the diode.
A method of a circuit for controlling activation of a control device, wherein the circuit includes a first switch in a main current path, an alternative current path, and a control logic, the method comprising:
- closing the first switch to supply voltage to activate the control device;
- and
- opening the first switch in response to the voltage falling below a predefined threshold so that a higher volume of an interference current effectuated by a present negative voltage flows via the alternative current path.
A circuit arrangement for activating a control device, the circuit arrangement comprising:
- a first switch in a main current path and via which the control device is activatable;
- an alternative current path that includes (a) an RC element or a varistor, and (b) a diode that is connected in parallel to the RC element or varistor;
- and
- a control logic, wherein the control logic is configured to open the first switch in response to a voltage present for the activation of the control device falling below a predefined threshold so that a higher volume of an interference current effectuated by a present negative voltage flows via the alternative current path.
Dependencies are inferred from the claim text.