公开(公告)号：US20020180523A1

公开(公告)日：2002-12-05

申请号：US10131131

申请日：2002-04-25

Applicant: Hitachi Kokusai Electric Inc.

Inventor： Yoichi Okubo ,  Kiyoshi Funada ,  Masaki Suto ,  Masato Horaguchi ,  Toshio Takada ,  Naoki Hongo

IPC: H03F001/26

CPC classification number: H03F1/3247 ,  H03F1/3205 ,  H03F1/3282 ,  H03F1/3288 ,  H03F2200/102 ,  H03F2201/3206 ,  H03F2201/3233

Abstract: There is provided a distortion canceling circuit for reducing an unbalance between a higher and a lower 3rd order distortion at frequencies of (2nullf2nullf1) and (2nullf1nullf2), respectively, the distortions being generated by an amplifier which amplifies an input signal having at least two frequency components, i.e., f1 and f2. Phase modulation control means supply a control signal, which has a difference frequency of (f2nullf1), to phase modulation means, the control signal being generated based on the amplified input signal outputted from the amplifier. The phase modulation means performs phase modulation on the amplified input signal based on the supplied control signal to thereby generate a higher and a lower side-band signal having frequencies of (2nullf2nullf1) and (2nullf1nullf2), respectively, each of which has an identical amplitude and a phase difference of 180null with respect to each other. The distortion canceling circuit reduces the unbalance by using the side-band signals.

Abstract translation: 提供了一种用于减小在（2.f2-f1）和（2.f1-f2）频率处的较高和较低三阶失真之间的不平衡的失真消除电路，失真是由放大器 具有至少两个频率分量的输入信号，即f1和f2。 相位调制控制装置将具有差分频率（f2-f1）的控制信号提供给相位调制装置，该控制信号是根据从放大器输出的放大的输入信号产生的。 相位调制装置基于所提供的控制信号对放大的输入信号执行相位调制，从而分别产生频率为（2.f2-f1）和（2.f1-f2）的较高和较低的边带信号 ，其中的每一个具有相同的振幅和相对于彼此为180°的相位差。 失真消除电路通过使用边带信号来减少不平衡。

公开(公告)号：US20030085761A1

公开(公告)日：2003-05-08

申请号：US10153630

申请日：2002-05-24

Applicant: Hitachi Kokusai Electric Inc.

Inventor： Yoichi Okubo ,  Kiyoshi Funada ,  Masaki Suto ,  Masato Horaguchi ,  Toshio Takada ,  Naoki Hongo

IPC: H03F001/26

CPC classification number: H03F1/3229 ,  H03F1/32 ,  H03F1/3247 ,  H03F2200/102 ,  H03F2201/3206

Abstract: A distortion reducing circuit compensates an upper side third-order distortion and a lower side third-order distortion produced by an amplifier for amplifying a fundamental signal including multiple frequency components. The distortion reducing circuit includes a second harmonic reflection coefficient regulation circuit, installed at an output side of the amplifier, for regulating reflection coefficients for multiple frequency components included in a second harmonic signal to have a constant value.

Abstract translation: 失真减小电路补偿由用于放大包括多个频率分量的基本信号的放大器产生的上侧三阶失真和下侧三次失真。 失真减小电路包括安装在放大器的输出侧的二次谐波反射系数调节电路，用于调节包括​​在二次谐波信号中的多个频率分量的反射系数以具有恒定值。