Amplifier system with dynamically-adjusted supply voltage
AssigneeTexas Instruments Incorporated
InventorJoseph T. Nabicht
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Abstract
An amplifier system may include an output stage configured to provide an amplified output signal at an output thereof based on an input signal, the output stage being connected between first and second supply voltages. A dynamic power supply control system provides the first and second supply voltages, the dynamic power supply being configured to adjust the first and second supply voltages as a function of the input signal such that a difference between the first and second supply voltages remains substantially constant.
Claims20
An amplifier system comprising:
- an output stage configured to provide an amplified output signal at an output thereof based on an input signal, the output stage being connected between first and second supply voltages;
- and
- a dynamic power supply control system that provides the first and second supply voltages, the dynamic power supply being configured to adjust the first and second supply voltages as a function of the input signal such that a difference between the first and second supply voltages remains substantially constant.
An amplifier system comprising:
- core amplifier circuitry comprising:
- a driver that provides a driver control signal based on an input signal to be amplified, the driver providing the driver control signal according to the classification type of the core amplifier circuitry;
- and
- an output stage configured to provide an amplified output signal at an output thereof based on the driver control signal, the output stage being connected between first and second supply voltages;
- and
- a detector coupled to monitor the input signal and provide a detector signal that represents a level of the input signal;
- a dynamic power supply that provides the first and second supply voltages based on the detector signal, the dynamic power supply being configured to continuously adjust the first and second supply voltages based on the detector signal while maintaining a substantially constant difference between the first and second supply voltages, the first and second supply voltages being adjusted relative to minimum positive and negative bias levels of the dynamic power supply.
A method for amplifying an input signal to provide a corresponding output signal as an amplified version of the input signal, the method comprising:
- driving core amplifier circuitry with a driver signal to cause output stage to supply current relative to a load which is coupled to an output thereof, the output stage being connected between first and second supply voltages, an intermediate node of the output stage defining the output;
- and
- continuously modulating the first and second supply voltages as a function of the input signal while maintaining a substantially constant difference between the first and second supply voltages.
Dependencies are inferred from the claim text.