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US 7,613,016 B2Granted
Power and information signal transfer using micro-transformers
AssigneeAnalog Devices, Inc.
InventorsBaoxing Chen, Ronn Kliger
Life of this patent
Estimating the term…
Abstract
A power converter provides power across an isolation barrier, such as through the use of coils. A coil driver has transistors connected in a positive feedback configuration and is coupled to a supply voltage in a controlled manner by measuring the output power and opening or closing a switch as needed between the power supply and the coil driver. An output circuit, such as a FET driver, can be used with or without isolation to provide power and a logic signal.
Claims8
A power converter comprising:
- a first micro-transformer for receiving an input signal at a first planar winding and for providing an isolated signal isolated from the received signal at a second planar winding;
- a coil driver, including transistors connected in a positive feedback configuration, coupled to the first planar winding;
- a switch for coupling a voltage to the coil driver;
- an output terminal for supplying a regulated DC signal based on the isolated signal;
- and
- a feedback circuit coupled to the output terminal and the switch, the feedback circuit including a second micro-transformer.
3 more elements
A circuit comprising:
- a single micro-transformer having a primary winding and a secondary winding;
- a coil driver, including transistors connected in a positive feedback configuration, coupled to the primary winding;
- a switch coupling a voltage to the coil driver;
- and
- a rectifier coupled to the secondary winding providing a DC output;
- wherein the switch has a control port controlled by a logic information signal, the circuit providing power conversion and the logic signal through said single micro-transformer.
3 more elements
A circuit comprising:
- a transformer having a primary winding and a secondary winding;
- a coil driver, including transistors connected in a positive feedback configuration, coupled to the primary winding;
- a switch coupling a voltage to the coil driver;
- a rectifier coupled to the secondary winding providing a DC output;
- and
- a driver coupled to a control port of the switch;
- wherein the control part of the switch is controlled by a logic information signal, the circuit providing power conversion and the logic information signal through said transformer.
4 more elements
Dependencies are inferred from the claim text.