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US 10,707,816 B2Granted
Amplifier output stage using toroidal transformer
AssigneeReal Analog, LLC
InventorRudolph J. Liedtke
Life of this patent
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Abstract
An audio amplifier includes an output stage including a first toroidal transformer with a first pair of secondary windings that are coupled in parallel across an output terminal. The output stage further includes a second toroidal transformer with a second pair of secondary windings that are connected in a series combination that is coupled across the output terminal.
Claims13
An output stage for an AC audio amplifier comprising:
- a first toroidal transformer with a first pair of secondary windings that are coupled in parallel across AC audio output terminals providing a first coupling ratio across said AC audio output terminals;
- and
- a second toroidal transformer with a second pair of secondary windings that are connected in a series combination that is coupled across the AC audio output terminals providing a second coupling ratio across said AC output terminals;
- wherein the first coupling ratio is greater than the second coupling ratio.
1 more element
An output stage for an AC audio amplifier comprising:
- a first toroidal transformer with a first pair of secondary windings that are coupled in parallel across AC audio output terminals;
- and
- a second toroidal transformer with a second pair of secondary windings that are connected in a series combination that is coupled across the AC audio output terminals;
- wherein the first toroidal transformer further comprises a first pair of primary windings coupled together at center terminals to a common voltage source and coupled in push-pull configuration to first and second amplifying elements, and the second toroidal transformer further comprises a second pair of primary windings coupled at center terminals to corresponding constant current sources and coupled in push-pull configuration to the first and second amplifying elements.
1 more element
Dependencies are inferred from the claim text.