Power circuits for power amplifiers and communication systems using the same
AssigneeMediatek Inc.
InventorsLong-Kun Yu, Wen-Wei Yang
Life of this patent
Estimating the term…
Abstract
A power circuit for a power amplifier which operates in an inactive period and an active period is provided and includes a power supply unit, a current limiting unit, a storage unit, and a converting unit. The power supply unit provides a first current. The current limiting unit is arranged to process the first current to generate a second current. The storage unit is arranged to provide a storage voltage. The storage unit is charged by the second current during the inactive period and discharged by a third current during the active period. The converting unit provides an active power to the power amplifier according to the storage voltage, the second current, and the third current during the active period.
Claims12
A power circuit for a power amplifier operating during an inactive period and an active period, comprising:
- a power supply unit for providing a first current;
- a current limiting unit for processing the first current to generate a second current;
- a storage unit for providing a storage voltage, wherein the storage unit is charged by the second current during the inactive period and discharged by a third current during the active period;
- and
- a converting unit providing an active power to the power amplifier according to the storage voltage, the second current, and the third current during the active period, wherein the converting unit converts the storage voltage to a fixed driving voltage and further receives the second current and the third current to generate a driving current with a first level during the active period and provides the active power according to the fixed driving voltage and the driving current with the first driving current level to the power amplifier.
A communication system comprising:
- a transceiver for receiving a transmission signal, processing a radio frequency component of the transmission signal, and providing the processed transmission signal;
- a power amplifier, operating during an inactive period and an active period, for receiving the processed transmission signal and amplifying a power of the processed transmission signal;
- and
- a power circuit, for providing an active power to the power amplifier during the active period, comprising:
- a power supply unit for providing a first current;
- a current limiting unit for processing the first current to generate a second current;
- a storage unit for providing a storage voltage, wherein the storage unit is charged by the second current during the inactive period and discharged by a third current during the active period;
- and
- a converting unit for providing the active power to the power amplifier according to the storage voltage, the second current, and the third current during the active period.
Dependencies are inferred from the claim text.