Flyback Amplifier with Direct Feedback
AssigneeCogniPower, LLC
InventorThomas E. Lawson
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Abstract
In at least one embodiment, the invention provides a bidirectional amplifier and method of control that enables immediate feedback directly from the output for fast response and low distortion. Mechanisms responsive to instantaneous feedback eliminate undershoot, overshoot, and sub-harmonic behavior. One embodiment comprises two switches and a single two-terminal inductor. Another embodiment produces a bipolar output from a single unregulated supply rail. The use of Predictive Energy Balancing controls yield high efficiency and low total harmonic distortion. These amplifiers are suited for audio application, and can drive piezo or dynamic speakers.
Claims11
A switched-mode amplifier comprising:
- an inductive element;
- a first switch;
- a second switch;
- and
- a controller, wherein:
- the inductive element, the first switch, and the second switch are all connected to a shared node;
- the inductive element is connected between the shared node and ground;
- the first switch is connected between the shared node and a first power port of the amplifier;
- the second switch is connected between the shared node and an output port of the amplifier;
- and
- the controller is connected to an input port of the amplifier and configured to operate the first and second switches to perform bidirectional energy transfers as required to cause the output port to follow an arbitrary input voltage applied at the input port.
11-20. (canceled)
Dependencies are inferred from the claim text.