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    • 3. 发明授权
    • PLL modulation circuit, radio transmission device, and radio communication device
    • PLL调制电路,无线电传输设备和无线电通信设备
    • US07979038B2
    • 2011-07-12
    • US12160874
    • 2007-01-16
    • Yosuke MitaniShunsuke HiranoKaoru Ishida
    • Yosuke MitaniShunsuke HiranoKaoru Ishida
    • H04B1/04
    • H03L7/1976H03C3/0908H03C3/0925H03C3/0933H03C3/0941H03C3/095H03C3/0966
    • Provided are a PLL modulation circuit, a radio transmission device, and a radio communication device capable of maintaining a modulation accuracy for modulation of a wide band. The PLL modulation circuit (100) includes: a PLL unit (110), first modulation signal input means for inputting a first modulation signal to a divider (112) or a phase comparator (113) of the PLL unit (110); second modulation signal input means for DA converting the digital modulation signal in a DA converter (116) to generate an analog second modulation signal and inputting it to a voltage control oscillator (111) of the PLL unit (110); a second divider for dividing the output signal of the voltage control oscillator (111); and control means for generating a center frequency control signal, a gain control signal, and a second division ration control signal according to the channel selection signal and the control voltage inputted to the voltage control oscillator (111) and supplying them to the divider (112), the DA converter (116), and the second divider (114), respectively.
    • 提供了能够维持宽带调制的调制精度的PLL调制电路,无线发送装置以及无线通信装置。 PLL调制电路(100)包括:PLL单元(110),用于将第一调制信号输入到PLL单元(110)的分频器(112)或相位比较器(113)的第一调制信号输入装置; 第二调制信号输入装置,用于在DA转换器(116)中转换数字调制信号,以产生模拟第二调制信号并将其输入到PLL单元(110)的电压控制振荡器(111); 用于分压电压控制振荡器(111)的输出信号的第二分频器; 以及控制装置,用于根据输入到电压控制振荡器(111)的通道选择信号和控制电压产生中心频率控制信号,增益控制信号和第二分频控制信号,并将其提供给分频器(112) ),DA转换器(116)和第二分频器(114)。
    • 4. 发明授权
    • Transmission modulation apparatus
    • 传输调制装置
    • US07747230B2
    • 2010-06-29
    • US11750640
    • 2007-05-18
    • Taichi IkedoKaoru Ishida
    • Taichi IkedoKaoru Ishida
    • H04B1/04H04K3/00
    • H04B1/04H03F1/34H03F3/24H04B2001/0433
    • A transmission modulation apparatus capable of dealing with characteristic variations of a high-frequency power amplifier without always forming an amplitude loop. Transmission modulation apparatus 100 is configured with level detector 140 that receives input of a level detection control signal and detects the output signal of high-frequency power amplifier 130, and offset voltage correcting section 150 that corrects an offset voltage using collinear approximation including a first point where the relationship between the power supply voltage value and the output voltage starts to shift from linear to non-linear based on an output signal of level detector 140 and a second point where output voltage is a minimum. Offset voltage correction is adaptively executed, and linearity between the voltage value of the baseband amplitude signal and the output voltage of high-frequency power amplifier 130 when the voltage value of the baseband amplitude signal is low is compensated.
    • 一种传输调制装置,能够处理高频功率放大器的特性变化,而不必总是形成振幅环路。 传输调制装置100配置有电平检测器140,其接收电平检测控制信号的输入并检测高频功率放大器130的输出信号,以及偏移电压校正部150,其使用包括第一点的共线近似来校正偏移电压 其中电源电压值和输出电压之间的关系基于电平检测器140的输出信号和输出电压最小的第二点开始从线性转变为非线性。 自适应地执行偏移电压校正,并且补偿基带振幅信号的电压值低时基带幅度信号的电压值与高频功率放大器130的输出电压之间的线性度。
    • 6. 发明授权
    • Transmission circuit and communication apparatus comprising the same
    • 发送电路及其通信装置
    • US07616702B2
    • 2009-11-10
    • US11653284
    • 2007-01-16
    • Kaoru Ishida
    • Kaoru Ishida
    • H04L27/36
    • H04W52/52H03G3/3042H03G3/3047
    • A transmission circuit is provided which can quickly and accurately control an output power of a transmission signal even when the transmission signal is output at a high modulation rate and in a wide dynamic range. A switching control section controls a modulation method changing section to change a modulation method of a modulated signal generating section to a modulation method having a narrow dynamic range before controlling a switching section to switch amplification sections. An output adjustment control section controls output adjusting sections so that a difference in level between a transmission signal which is smoothed by a smoothing circuit and is before the amplification sections are switched, and a transmission signal which is after the amplification sections are switched, is caused to be smaller than a predetermined difference threshold value, when the modulated signal generating section operates in the modulation method having the narrow dynamic range.
    • 即使传输信号以高调制率和宽的动态范围输出,也能够快速准确地控制发送信号的输出功率的发送电路。 切换控制部分控制调制方法改变部分,以在控制切换部分以切换放大部分之前将调制信号产生部分的调制方法改变为具有窄动态范围的调制方法。 输出调整控制部分控制输出调节部分,使得平滑电路平滑并且在放大部分之前被切换的发送信号之间的电平差和放大部分之后的发送信号被切换 当调制信号生成部分以具有窄动态范围的调制方法操作时,小于预定差值阈值。
    • 9. 发明授权
    • Predistortion circuit and power amplifier
    • 预失真电路和功率放大器
    • US06933780B2
    • 2005-08-23
    • US09772883
    • 2001-01-31
    • Seiji FujiwaraToru MatsuuraKaoru IshidaMakoto Sakakura
    • Seiji FujiwaraToru MatsuuraKaoru IshidaMakoto Sakakura
    • H03F1/32H03F1/26
    • H03F1/3276
    • A predistortion circuit has an input terminal for inputting a predetermined signal; a nonlinear device directly or indirectly connected to the input terminal; a bias supply circuit for applying a voltage to the nonlinear device; specific-frequency suppressing means connected to one side or both sides of the nonlinear device directly without another intervening device and of suppressing all or part of such frequencies that are from a frequency corresponding to DC to a frequency corresponding to an occupied band width of an input signal inputted to the input terminal and/or suppressing at least one higher harmonic frequency of a carrier wave of the input signal; and an output terminal for outputting a signal.
    • 预失真电路具有用于输入预定信号的输入端子; 直接或间接连接到输入端的非线性装置; 用于向非线性装置施加电压的偏置电源电路; 特定频率抑制装置直接连接到非线性装置的一侧或两侧,而没有另一个中间装置,并且将来自对应于DC的频率的全部或部分频率抑制到对应于输入的占用带宽的频率 输入到输入端子的信号和/或抑制输入信号的载波的至少一个高次谐波频率; 以及用于输出信号的输出端子。
    • 10. 发明申请
    • Power amplifier
    • 功率放大器
    • US20050046477A1
    • 2005-03-03
    • US10964762
    • 2004-10-15
    • Toshimitsu MatsuyoshiKaoru IshidaSeiji Fujiwara
    • Toshimitsu MatsuyoshiKaoru IshidaSeiji Fujiwara
    • H03F1/32H03F1/26
    • H03F1/3247H03F2200/102
    • A power amplifier capable of compensating for distortion by pre-distortion and achieving a large distortion suppressing effect even if IM3L components and IM3U components occurring at the power amplifier have a large level difference. A power amplifying circuit 117 amplifies an original signal. An envelope detector 119 generates an envelope signal having components identical to envelope components included in the original signal. Based on the original signal a distortion signal generating circuit 112 generates a distortion signal for canceling distortion components occurring while the original signal is amplified by the power amplifying circuit 117. In a power combiner 116, the envelope signal is injected to the original signal, thereby eliminating the asymmetric characteristic of the distortion components. In the power amplifying circuit 117, the distortion signal is injected to the original signal, thereby suppressing the distortion components.
    • 功率放大器能够通过预失真来补偿失真,并且即使在功率放大器处出现的IM3L分量和IM3U分量具有较大的电平差,也能实现大的失真抑制效果。 功率放大电路117放大原始信号。 包络检测器119产生具有与包含在原始信号中的包络分量相同的分量的包络信号。 基于原始信号,失真信号发生电路112产生用于消除由功率放大电路117放大原始信号时发生的失真分量的失真信号。在功率合成器116中,将包络信号注入原始信号,从而 消除了失真分量的不对称特性。 在功率放大电路117中,将失真信号注入原始信号,从而抑制失真成分。