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    • 2. 发明授权
    • Resistor-capacitor oscillation circuit capable of adjusting oscillation frequency and method of the same
    • 电阻电容振荡电路能够调节振荡频率及其方法
    • US07612624B2
    • 2009-11-03
    • US11928720
    • 2007-10-30
    • Joon Hyung LimTah Joon ParkKwang Mook LeeKoon Shik Cho
    • Joon Hyung LimTah Joon ParkKwang Mook LeeKoon Shik Cho
    • H03K3/02
    • H03K3/011H03L7/06
    • An RC oscillation circuit and method capable of adjusting an oscillation frequency includes: an RC oscillator including a variable resistor and a variable capacitor, the RC oscillator generating an RC oscillating signal having a frequency determined by a resistance of the variable resistor and a capacitance of the variable capacitor; a counter counting a clock number of a reference oscillating signal corresponding to one period of the RC oscillating signal to generate a first count value, the reference oscillating signal having a preset frequency; and a frequency controller controlling a frequency of the RC oscillating signal by determining the resistance of the variable resistor and the capacitance of the variable capacitor such that a difference between the first count value and a preset second count value is smaller than a preset first critical value.
    • 一种能够调节振荡频率的RC振荡电路和方法包括:RC振荡器,包括可变电阻器和可变电容器,RC振荡器产生具有由可变电阻器的电阻确定的频率的RC振荡信号和 可变电容器 计数对应于RC振荡信号的一个周期的参考振荡信号的时钟数,以产生第一计数值,所述参考振荡信号具有预置频率; 以及频率控制器,通过确定可变电阻器的电阻和可变电容器的电容来控制RC振荡信号的频率,使得第一计数值和预设的第二计数值之间的差小于预设的第一临界值 。
    • 3. 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。
    • 4. 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。
    • 10. 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。