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US 10,320,343 B1Granted
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 audio amplifier comprising:
- first and second amplifying elements driven by associated control signals that are 180 degrees out of phase with each other;
- a first toroidal transformer with first and second primary windings coupled together at center terminals to a common voltage source and coupled in push-pull configuration to the first and second amplifying elements, and with first and second secondary windings that are coupled in parallel across output terminals;
- and
- a second toroidal transformer with first and second primary windings coupled at center terminals to corresponding constant current sources and coupled in push-pull configuration to the first and second amplifying elements, and with first and second secondary windings that are coupled in series across the output terminals.
1 more element
An output stage for an audio amplifier comprising:
- a first toroidal transformer with 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 with a first pair of secondary windings that are coupled in parallel across output terminals;
- and
- a second toroidal transformer with a second pair of primary windings coupled at center terminals to separate constant current sources and coupled in push-pull configuration to the first and second amplifying elements, and with a second pair of secondary windings that are coupled in series across the output terminals.
Dependencies are inferred from the claim text.