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    • 1. 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。
    • 5. 发明申请
    • SLEEP CURRENT ADJUSTING CIRCUIT OF SYSTEM ON CHIP
    • 休眠电流调节系统芯片电路
    • US20080278139A1
    • 2008-11-13
    • US12105966
    • 2008-04-18
    • Yong Il KwonMyeung Su KimJoon Hyung LimKoon Shik ChoTah Joon Park
    • Yong Il KwonMyeung Su KimJoon Hyung LimKoon Shik ChoTah Joon Park
    • H02M3/156
    • G11C5/14G11C5/148
    • There is provided a sleep current adjusting circuit of a system on chip including: a regulator supplying a turn-on voltage and a normal current when a mode selection signal is a normal mode signal, and a turn-off voltage when the mode selection signal is a sleep mode signal; a switching device turned on by the turn-on voltage of the regulator to supply the normal current from the regulator to a main circuit part and a sleep operation circuit part, respectively, and turned off by the turn-off voltage of the regulator to block the normal current from being supplied to the main circuit part and supply the sleep current to the sleep operation circuit part; and a current limit device limiting an operating current flowing in response to the operating voltage and supplying the sleep current to the sleep operation circuit part.
    • 提供了一种片上系统的睡眠电流调节电路,包括:当模式选择信号是正常模式信号时,提供接通电压和正常电流的调节器,以及当模式选择信号为 睡眠模式信号; 开关装置由调节器的导通电压导通,以分别将调节器的正常电流提供给主电路部分和睡眠操作电路部分,并通过调节器的截止电压将其截止以阻止 正常电流被提供给主电路部分并将睡眠电流提供给睡眠操作电路部分; 以及电流限制装置,其限制响应于所述工作电压流动的工作电流并将睡眠电流提供给所述睡眠操作电路部分。
    • 10. 发明授权
    • Micropower RC oscillator
    • 微功率RC振荡器
    • US07612623B2
    • 2009-11-03
    • US11756032
    • 2007-05-31
    • Joon Hyung LimMyeung Su KimYong Il KwonTah Joon Park
    • Joon Hyung LimMyeung Su KimYong Il KwonTah Joon Park
    • H03K3/26
    • H03K4/06
    • A micropower RC oscillator comprises a current generating section including a current source that generates a current; and a variable resistor of which the magnitude is variably set and which is configured by combining resistor elements at a predetermined ratio, the resistor elements having opposite characteristics to each other with respect to a temperature change, the variable resistor adjusting the magnitude of the generated current; a start-up circuit section connected to the current generating section and fixing a bias operating point to a constant value such that the current generating section stably generates a current; a charge and discharge circuit section including a variable capacitor, of which the magnitude is variably set, and a plurality of transistors, the charge and discharge circuit section charging and discharging the variable capacitor by using the current generated from the current generating section and the plurality of transistors; an oscillation signal output section connected to the charge and discharge circuit section and including a plurality of inverters, the oscillation signal output section outputting an oscillation signal of which the frequency is determined by the resistance of the variable resistor and the capacitance of the variable capacitor; and an inverter driving power supply section mirroring the current generated from the current generating section and then providing the mirrored current as a driving power supply of the inverters.
    • 微功率RC振荡器包括电流产生部分,其包括产生电流的电流源; 以及可变电阻器,其大小可变地设置,并且通过以预定比例组合电阻器元件来构成,所述电阻器元件相对于温度变化具有彼此相反的特性,所述可变电阻器调节所产生的电流的幅度 ; 连接到电流产生部分的启动电路部分,并将偏压工作点固定为恒定值,使得电流产生部件稳定地产生电流; 一个充电和放电电路部分,包括其可变电容值的可变电容器,以及多个晶体管,该充放电电路部分通过使用从电流产生部分产生的电流和多个晶体管对可变电容器进行充电和放电 的晶体管; 振荡信号输出部分连接到充放电电路部分并且包括多个反相器,振荡信号输出部分输出频率由可变电阻器的电阻确定的振荡信号和可变电容器的电容; 以及反相器驱动电源部,其将从电流产生部产生的电流反射,然后提供镜像电流作为逆变器的驱动电源。