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.
Claims16
A switching mode power converter including a first on-chip transformer without a ferrous core, the transformer including at least a first winding and a second winding coupling power from the first winding to the second winding;
- a coil driver, including transistors connected in a positive feedback configuration, coupled to the first winding;
- a switch coupling power to the first winding;
- and a feedback circuit coupling a feedback signal derived from a signal on the second winding to control the switch.
A switching mode power converter comprising:
- a first on-chip transformer without a ferrous core, the transformer including at least a first winding and a second winding for coupling power from the first winding to the second winding;
- a coil driver connected, including transistors connected in a positive feedback configuration, coupled to the first winding;
- a tank circuit coupled in parallel to the first winding and the coil driver;
- a switch coupling power to the coil driver;
- and a feedback circuit for coupling a feedback signal derived from a signal on the second winding to control the switch.
Dependencies are inferred from the claim text.