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    • 6. 发明申请
    • DIGITAL AMPLITUDE MODULATOR AND POLAR TRANSMITTER USING THEREOF
    • 数字振幅调制器及其使用的极性发射器
    • US20110280334A1
    • 2011-11-17
    • US12859800
    • 2010-08-20
    • Joon Hyung LimHan Jin ChoYong Il KwonKyung Hee HongKoon Shik ChoMyeung Su Kim
    • Joon Hyung LimHan Jin ChoYong Il KwonKyung Hee HongKoon Shik ChoMyeung Su Kim
    • H04L27/00H03C1/02
    • H04L27/361H03C5/00H03F2200/331H03M1/682H03M1/685H03M7/3042
    • The present invention provides a digital amplitude modulator and polar transmitter using the same. The polar transmitter includes: a polar converter for converting an input signal into an amplitude information signal and a phase information signal, and outputting the converted amplitude and phase information signal; a sigma-delta modulator for receiving a fractional part of the amplitude information signal, and generating a correcting value for an integer part of the amplitude information signal; a phase-modulator for upward-modulating the phase information signal outputted from the polar converter, and outputting carrier waves including the upward-modulated phase information signal; and a digital power amplifier for generating an output signal whose amplitude corresponds to the integer part of the amplitude information signal which is subjected to correction by the correcting value, and outputting combining the output signal with an output value of the phase-modulator to output the combined signal.
    • 本发明提供一种数字振幅调制器和使用该调幅器的极化发射机。 极性发射机包括:极化转换器,用于将输入信号转换为振幅信息信号和相位信息信号,并输出转换的幅度和相位信息信号; 一个Σ-Δ调制器,用于接收幅度信息信号的分数部分,并产生一个幅度信息信号整数部分的校正值; 相位调制器,用于对从极化转换器输出的相位信息信号进行向上调制,并输出包括向上调制相位信息信号的载波; 以及数字功率放大器,用于产生其幅度对应于通过校正值进行校正的振幅信息信号的整数部分的输出信号,并且输出将输出信号与相位调制器的输出值相组合以输出 组合信号。
    • 7. 发明申请
    • LOW-POWER RADIO FREQUENCY DIRECT CURRENT RECTIFIER
    • 低功耗无线电频率直流电流整流器
    • US20100033999A1
    • 2010-02-11
    • US12332265
    • 2008-12-10
    • Joon Hyung LimTah Joon ParkMyeung Su KimKyung Hee HongYong II Kwon
    • Joon Hyung LimTah Joon ParkMyeung Su KimKyung Hee HongYong II Kwon
    • H02M7/217
    • H02M7/103
    • Provided is a low-power radio frequency (RF) direct current (DC) rectifier. The low-power RF DC rectifier includes a rectification circuit with first and second to n-th rectification units sequentially rectifying an RF signal input through a first input terminal and a second input terminal. The first rectification unit is disposed between the first and second input terminals and a first output terminal of the first rectification unit. The second rectification unit is disposed between the first rectification unit and a second output terminal of the second rectification unit, is biased by the first rectification unit. The n-th rectification unit is disposed between an immediately previous rectification unit and a rectification output terminal of the rectification circuit, is biased by a rectified voltage output from an immediately preceding rectification unit, and outputs the rectified RF signal through the rectification output terminal.
    • 提供了一种低功率射频(RF)直流(DC)整流器。 低功率RF直流整流器包括具有第一和第二至第n整流单元的整流电路,其顺序地对通过第一输入端子和第二输入端子输入的RF信号进行整流。 第一整流单元设置在第一和第二输入端子与第一整流单元的第一输出端子之间。 第二整流单元设置在第一整流单元和第二整流单元的第二输出端子之间,被第一整流单元偏置。 第n整流单元配置在整流电路的前一整流单元与整流输出端之间,由前一整流单元输出的整流电压偏置,并通过整流输出端输出整流后的RF信号。