Device and method for electronic circuit power
AssigneeSTMicroelectronics (Rousset) SAS
InventorsNicolas Demange, Nicolas Borrel, Jimmy Fort
Life of this patent
Estimating the term…
Abstract
The present invention concerns an electronic circuit power supply device, configured to: flow, through a first conductor connected to a node, a first current that is an image of a second current consumed by the electronic circuit; flow a third current through a second conductor connected to the node, a first branch of a current mirror conducting the third current; flow a fourth constant current through a third conductor connected to the node; consume a fifth current that is an image of the third current; and regulate a potential of the node by acting on a gate potential of a transistor electrically in series with a second branch of the current mirror.
Claims20
A device for powering an electronic circuit, the device comprising:
- a first transistor having a drain terminal coupled to a node, a first current flowing at the drain terminal of the first transistor;
- a second transistor having a drain terminal coupled to the electronic circuit, a second current flowing at the drain terminal of the second transistor that is an image of the first current, a control terminal of the first transistor coupled to a control terminal of the second transistor;
- a third transistor having a drain terminal coupled to the node, a third current flowing at the drain terminal of the third transistor;
- a resistive element coupled to the node, a fourth constant current flowing through the resistive element;
- a fourth transistor having a control terminal coupled to a control terminal of the third transistor, a fifth current flowing at a drain terminal of the fourth transistor that is an image of the third current;
- and
- a fifth transistor configured to regulate a potential of the node by acting on a control terminal of the fifth transistor electrically in series with the drain terminal of the fourth transistor.
A method of supplying power to an electronic circuit, the method comprising:
- flowing, through a drain terminal of a first transistor coupled to a node, a first current;
- flowing a second current at a drain terminal of a second transistor coupled to the electronic circuit, the second current being an image of the first current, a control terminal of the first transistor coupled to a control terminal of the second transistor;
- flowing a third current through a drain terminal of a third transistor coupled to the node;
- flowing a fourth constant current through a resistive element coupled to the node;
- flowing a fifth current that is an image of the third current at a drain terminal of a fourth transistor, the fourth transistor having a control terminal coupled to a control terminal of the third transistor;
- and
- regulating, by a fifth transistor, a potential of the node by acting on a control terminal of the fifth transistor, the fifth transistor being electrically in series with the drain terminal of the fourth transistor.
An electronic chip comprising:
- an electronic circuit;
- and
- a device configured to power the electronic circuit, the device comprising:
- a first transistor having a drain terminal coupled to a node, a first current flowing at the drain terminal of the first transistor;
- a second transistor having a drain terminal coupled to the electronic circuit, a second current flowing at the drain terminal of the second transistor that is an image of the first current, a control terminal of the first transistor coupled to a control terminal of the second transistor;
- a third transistor having a drain terminal coupled to the node, a third current flowing at the drain terminal of the third transistor;
- a resistive element coupled to the node, a fourth constant current flowing through the resistive element;
- a fourth transistor having a control terminal coupled to a control terminal of the third transistor, a fifth current flowing at a drain terminal of the fourth transistor that is an image of the third current;
- and
- a fifth transistor configured to regulate a potential of the node by acting on a control terminal of the fifth transistor electrically in series with the drain terminal of the fourth transistor.
Dependencies are inferred from the claim text.