Circuit with a regulated charge pump
AssigneeAtmel Automotive GmbH
InventorAndreas Schubert
Life of this patent
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Abstract
A circuit, method for regulation, and use thereof is provided, whereby the circuit can include a charge pump that is connected to a supply voltage terminal in order to produce a pump voltage from a supply voltage, and includes a control circuit whose inputs are connected to the output of the charge pump and to the supply voltage terminal in order to sense a difference between the pump voltage and the supply voltage as a controlled variable. The circuit is designed to compare the controlled variable to a reference variable, and output is connected to a control input of the charge pump in order to control the charge pump as a function of the comparison.
Claims10
A circuit comprising:
- a charge pump configured to be connectable to a supply voltage terminal to produce a pump voltage from a supply voltage;
- and
- a control circuit having at least one input connectable to an output of the charge pump and to the supply voltage terminal to sense a difference between the pump voltage and the supply voltage as a controlled variable,
- wherein the control circuit is configured to compare the controlled variable to a reference variable, and
- wherein an output of the control circuit is connectable to a control input of the charge pump to control the charge pump as a function of the comparison.
A method for regulation with a charge pump, the method comprising:
- measuring a difference between a pump voltage at an output of a charge pump and a supply voltage;
- comparing the difference or a quantity derived from the difference to a reference value;
- and
- changing a control signal that controls the charge pump as a function of the comparison to produce the pump voltage from the supply voltage.
Dependencies are inferred from the claim text.