| 摘要 |
PURPOSE: A device for controlling the reverse of double right direction of a linear power amplifier is provided to remove the interference of the additional mutual modulation, which is generated in case that the level of the output is high and the volume of a linear power amplifier is low. CONSTITUTION: A device for controlling the reverse of double right direction of a linear power amplifier includes a detecting portion(51) of a circuit for controlling the reverse of the first right direction, a controlling portion(52) of a circuit for controlling the reverse of the first right direction, a detecting portion(53) of a circuit for controlling the reverse of the second right direction and a controlling portion(54) of a circuit for controlling the reverse of the second right direction. The detecting portion(51) of a circuit for controlling the reverse of the first right direction carries out delaying and controlling the phase and diminishing in order that the signal of CDMA mode detects the error signal by the interference of the mutual modulation generated through the main amplifier. The controlling portion(52) of a circuit for controlling the reverse of the first right direction carries out delaying and controlling the phase and diminishing to remove the interference of the mutual modulation by using the error signal detected in the detecting portion of the detecting portion(51) of the circuit for controlling the reverse of the first right direction. The detecting portion(53) of a circuit for controlling the reverse of the second right direction carries out delaying and controlling the phase and diminishing to detect the error signal by the interference of the mutual modulation generated by the amplification of the controlling portion of the detecting portion(51) of the circuit for controlling the reverse of the first right direction. The controlling portion(54) of a circuit for controlling the reverse of the second right direction carries out delaying and controlling the phase and diminishing to remove the interference of the mutual modulation by using the error signal detected in the detecting portion of the detecting portion(53) of a circuit for controlling the reverse of the second right direction.
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