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US 7,116,162 B2Granted
Reduced output topology for multi-reference switching amplifiers
AssigneeJAM Technologies, LLC
InventorLarry Kirn
Life of this patent
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Abstract
A method and attendant circuitry reduces the number of regulatory and switching devices in a multi-reference switching amplifier. In the preferred embodiment, multiple independently-modulated effective references are summed at a load through use of both linear and switched control of switching devices.
Claims2
In a multi-reference switching amplifier wherein switching devices control power supplied to a load in response to an input data stream having a sign, a simplified output topology, comprising:
- first and second independently modulated references, wherein the second one of the references is derived through a voltage divider;
- a data separator operative to separate the input data stream into course-resolution data and fine-resolution data;
- circuitry for modulating the first one of the references on one side of the load as a function of the coarse-resolution data;
- and
- circuitry for modulating second one of the references on the other side of the load as a function of the fine-resolution data.
2 more elements
Dependencies are inferred from the claim text.