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US 11,699,981 B2Granted
Audio power source with improved efficiency
AssigneeBiamp Systems, LLC
InventorsDavid F. Baretich, Simon J. Broadley
Life of this patent
Estimating the term…
Abstract
An improved method of providing high burst power to audio amplifiers from limited power sources, using parallel power paths to increase system efficiency without need for a power path controller, thus utilizing a simplified circuit operation and maximizing average power available for both the amplifier and supporting circuitry.
Claims20
Power delivery circuitry to deliver power to an audio device, the power delivery circuitry comprising:
- a limited power input connected to the audio device;
- a power transformer and a power storage device connected between the limited power input and the audio device;
- and
- an error amplifier connected to the power transformer and between the audio device and the pulse width modulation (PWM) controller, wherein the error amplifier is configured to output, based on a detected current from the power transformer, a signal to the PWM controller to cause the power storage device to provide power to the audio device.
1 more element
A method of dynamically controlling power in an audio system, the system comprising the steps of:
- monitoring, between a power input and a power transformer, a power load requirement of an amplifier supplied by the power transformer;
- communicating, via a current sensor, a current output of the transformer to an error amplifier;
- receiving, via a pulse width modulation (PWM) controller, a signal from the error amplifier;
- and
- causing, in response to the signal from the PWM controller, a power storage device to provide power to the amplifier.
2 more elements
A power management system for an audio system, comprising:
- at least a first and a second DC output, wherein the first DC output provides power to an audio amplifier and wherein the second DC output provides power to a storage unit and a buck regulator;
- an error amplifier;
- a differential amplifier configured to communicate with the error amplifier to compare a reference voltage provided by a voltage reference shunt, where an output from the error amplifier is fed to a Pulse Width Modulation (PWM) controller;
- and
- when an amplifier output requirement is above a power limit of the flyback converter, the buck regulator maintains voltage by power being drawn from the storage unit and pulled to the second DC output.
2 more elements
Dependencies are inferred from the claim text.