Circuit and method for operating a circuit
AssigneeAtmel Corporation
InventorsSven Jochmann, Lutz Dathe
Life of this patent
Estimating the term…
Abstract
In certain embodiments, a circuit comprises a first voltage source configured to provide a supply voltage at an output of the first voltage source for a subcircuit. The circuit further comprises at least one second voltage source configured to provide output voltage to supply the subcircuit when the first voltage source is deactivated. The circuit further comprises an evaluation circuit connectable to an output of the at least one second voltage source, to a control input of the at least one second voltage source, and to the output of the first voltage source. The evaluation circuit is configured to adjust, based on the supply voltage at the output of the first voltage source, an output voltage of the at least one second voltage source.
Claims20
A circuit comprising:
- a first voltage source configured to provide a supply voltage at an output of the first voltage source for a subcircuit, the subcircuit configured to have:
- an operating mode with an operating current through the subcircuit;
- and
- a sleep mode with a reduced current in comparison to the operating current through the subcircuit;
- and
- an evaluation circuit connectable to an output of at least one second voltage source, to a control input of the at least one second voltage source, and to the output of the first voltage source, the at least one second voltage source configured to provide an output voltage to supply the subcircuit, the evaluation circuit configured to:
- adjust the output voltage of the at least one second voltage source via a control signal at the control input of the at least one second voltage source, the at least one second voltage source being activated in the sleep mode;
- and
- adjust the output voltage of the at least one second voltage source based on an evaluation of the supply voltage at the output of the first voltage source, the first voltage source being activated in the operating mode and deactivated in the sleep mode.
A circuit comprising:
- a first voltage source configured to provide a supply voltage at an output of the first voltage source for a subcircuit;
- at least one second voltage source configured to provide an output voltage to supply the subcircuit when the first voltage source is deactivated;
- and
- an evaluation circuit connectable to an output of the at least one second voltage source, to a control input of the at least one second voltage source, and to the output of the first voltage source, the evaluation circuit configured to adjust, based on the supply voltage at the output of the first voltage source, an output voltage of the at least one second voltage source.
A method comprising:
- supplying, in an operating mode, a subcircuit having a first voltage source with a supply voltage;
- deactivating, in a sleep mode, the first voltage source and supplying the subcircuit with a second voltage source,
- wherein, in the operating mode, an output voltage of the second voltage source is adjusted as a function of the supply voltage of the first voltage source.
Dependencies are inferred from the claim text.