摘要:
The invention concerns a circuit for multi-standard wireless RF transmission comprising: input circuitry (302 to 314) for generating a transmission signal (IT(t), QT(t)) based on an input data signal (I, Q); a power amplifier (316) adapted to amplify said transmission signal to provide an output signal (S(t)) for transmission via at least one antenna; and feedback circuitry (320 to 340) comprising at least one variable low-pass filter (334, 336) for generating a feedback signal (IFB, QFB) based on said output signal, wherein said input circuitry further comprises pre-distortion circuitry (302) adapted to modify said input data signal (I, Q) based on said feedback signal.
摘要:
A reconfigurable power amplifier includes at least one amplification circuit (E1, E2), and a circuit (6) for controlling the amplification circuit so as to adapt its operation according to an applied input signal (RFin). The circuit for controlling includes a circuit (4, 5) for modifying the compression point of the amplification circuit and for adapting the gain of the amplification circuit in such a manner as to increase the power added efficiency of the circuit for the modified compression point.
摘要:
A reconfigurable power amplifier includes at least one amplification circuit (E1, E2), and a circuit (6) for controlling the amplification circuit so as to adapt its operation according to an applied input signal (RFin). The circuit for controlling includes a circuit (4, 5) for modifying the compression point of the amplification circuit and for adapting the gain of the amplification circuit in such a manner as to increase the power added efficiency of the circuit for the modified compression point.
摘要:
The invention concerns a circuit for multi-standard wireless RF transmission comprising: input circuitry (302 to 314) for generating a transmission signal (IT(t), QT(t)) based on an input data signal (I, Q); a power amplifier (316) adapted to amplify said transmission signal to provide an output signal (S(t)) for transmission via at least one antenna; and feedback circuitry (320 to 340) comprising at least one variable low-pass filter (334, 336) for generating a feedback signal (IFB, QFB) based on said output signal, wherein said input circuitry further comprises pre-distortion circuitry (302) adapted to modify said input data signal (I, Q) based on said feedback signal.