Power amplifier
AssigneeYamaha Corporation
InventorYohei OHTANI
Life of this patent
Estimating the term…
Abstract
A power amplifier includes a signal input unit to which an input signal is applied, an output stage that is electrically isolated from the signal input unit, where the output stage is configured to amplify an output signal of the signal input unit based on a power supply voltage from a floating power supply, a reference potential switch that is inserted between a reference node of the power supply voltage generated by the floating power supply and a reference potential line, and a feedback circuit configured to amplify a differential voltage between an output node of the output stage and the reference node, and feed the resultant voltage back to the signal input unit.
Claims4
A power amplifier comprising:
- a signal input unit to which an input signal is applied;
- an output stage that is electrically isolated from the signal input unit, where the output stage is configured to amplify an output signal of the signal input unit based on a power supply voltage from a floating power supply;
- a reference potential switch that is inserted between a reference node of the power supply voltage generated by the floating power supply and a reference potential line;
- and
- a feedback circuit configured to amplify a differential voltage between the reference node and an object driven by an output of the output stage, and feed the amplified differential voltage back to the signal input unit.
A power amplifier comprising:
- two or more power amplification units, wherein each of the two or more power amplification units includes:
- a signal input unit to which an input signal is applied;
- an output stage that is electrically isolated from the signal input unit, where the output stage is configured to amplify an output signal of the signal input unit based on a power supply voltage from a floating power supply;
- a reference potential switch that is inserted between a reference node of the power supply voltage generated by the floating power supply and a reference potential line;
- and
- a feedback circuit configured to amplify a differential voltage between the reference node and an object driven by an output of the output stage, and feed the amplified differential voltage back to the signal input unit.
Dependencies are inferred from the claim text.