Voltage source
AssigneeSTMicroelectronics (Alps) SAS
InventorKuno Lenz
Life of this patent
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Abstract
A voltage source wherein at least one first switch couples a first node of the voltage source to a node of application of at least one potential of a power supply voltage, and at least one first capacitive element couples the first node or a second node of the voltage source to a control node of the first switch.
Claims19
A voltage source wherein at least one first switch couples a first node of the voltage source to a node of application of at least one potential of a power supply voltage, and at least one first capacitive element couples the first node or a second node of the voltage source to a control node of the at least one first switch, wherein the at least one first switch and the at least one first capacitive element are configured to maintain substantially constant a voltage between the first node and the second node in response to a variation of a potential applied to the second node.
A floating gate voltage source, comprising:
- a first switch circuit having a first control node and being configured to couple a first output node of the voltage source to a supply voltage source;
- and
- a first capacitive circuit coupled between the first control node and a second output node of the voltage source, the second output node configured to be coupled to a terminal of a load coil and the first capacitive circuit configured to control a voltage on the first control node of the first switch circuit responsive to a change in a voltage on the second output node from a first level to a second level to drive the first switch circuit to maintain a reference voltage across the first and second output nodes.
A method, comprising:
- coupling a power supply voltage to a first output node through a first switch having a first control node;
- coupling a drive voltage having a first level or a second level to a second output node, the second output node configured to be coupled to a terminal of a load coil;
- and
- capacitively coupling the voltage on the second output node to the first control node to generate a first control voltage on the first control node of the first switch responsive to a change in the voltage on the second output node from the first level to the second level to drive the first switch to maintain a reference voltage across the first and second output nodes.
Dependencies are inferred from the claim text.