Audio Amplifier and Power Supply Voltage Switching Method
AssigneeYamaha Corporation
InventorMorito Yamada
Life of this patent
Estimating the term…
Abstract
An audio amplifier is provided with: an amplifier circuit; a power supply circuit that generates a plurality of power supply voltages; a power supply relay that selects one of the power supply voltages as the power supply voltage supplied to the amplifier circuit; a switching condition determiner that determines whether the switching condition of the power supply relay is satisfied; a silent section detector that detects a silent section of the audio signal which is equal to or greater than the operation time of the power supply relay; and a switching instruction unit for providing the power supply relay with an instruction for switching the power supply voltage during the silent section when the switching condition is satisfied and the silent section is detected.
Claims10
1-9. (canceled)
An audio amplifier comprising:
- an amplifier configured to amplify an input audio signal in a range of a power supply voltage;
- a power supply configured to generate a plurality of power supply voltages;
- a relay configured to select one of the power supply voltages as a power supply voltage supplied to the amplifier;
- a determiner configured to determine whether a condition for switching the selection of the power supply voltage by the relay is satisfied;
- a detector configured to detect a period of no audio signal which is equal to or greater than a required time to switch the relay;
- and
- a controller configured to switch the relay when said condition is satisfied and said period of no audio signal is detected.
A power supply voltage switching method comprising:
- amplifying an input audio signal by an amplifier in a range of a power supply voltage;
- selecting, by a relay, one of a plurality of power supply voltages generated by a power supply as the power supply voltage supplied to the amplifier;
- determining whether a condition for switching the selection of the power supply voltage is satisfied;
- detecting a period of no audio signal which is equal to or greater than a required time to switch the relay;
- and
- switch the relay when said condition is satisfied and said period of no audio signal is detected.
Dependencies are inferred from the claim text.