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US 8,274,328 B2Granted
Amplifying apparatus
AssigneeFujitsu Limited
InventorsHironobu Hongo, Katsutoshi Ishidoh
Life of this patent
Estimating the term…
Abstract
An amplifying apparatus includes an amplifier that amplifies a signal, using a voltage supplied; a power source unit that generates a first voltage and a second voltage having an amplitude greater than that of the first voltage; and a switching controller that, when the an envelope signal of the signal becomes current zero, switches between and supplies to the amplifier, the first voltage and the second voltage generated by the power source unit.
Claims11
An amplifying apparatus comprising:
- an amplifier that amplifies a signal, using a voltage supplied;
- a power source unit that generates a first voltage and a second voltage having an amplitude greater than that of the first voltage;
- and
- a switching controller that, when an envelope signal of the signal becomes current zero, switches between and supplies to the amplifier, the first voltage and the second voltage generated by the power source unit,
- the switching controller includes:
- a zero point detector that detects a rise and a fall from a current zero point, a point at which the envelope signal becomes the current zero, and
- a switching unit that supplies the first voltage during a first period from the detection of the fall by the zero point detector until the detection of the rise and supplies the second voltage during a second period from the detection of the rise until the detection of the fall.
4 more elements
An amplifying method for an apparatus having an amplifier, comprising:
- generating a first voltage and a second voltage having an amplitude greater than that of the first voltage;
- and
- switching between and supplying to the amplifier, the first voltage and the second voltage generated by the power source unit, when an envelope signal of the signal becomes current zero;
- amplifying a signal using the voltage supplied,
- the switching includes:
- detecting a rise and a fall from a current zero point, a point at which the envelope signal becomes the current zero, and
- supplying the first voltage during a first period from the detection of the fall until the detection of the rise and supplies the second voltage during a second period from the detection of the rise until the detection of the fall.
4 more elements
Dependencies are inferred from the claim text.