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    • 1. 发明授权
    • Antenna diversity receiver
    • 天线分集接收机
    • US08374565B2
    • 2013-02-12
    • US12188871
    • 2008-08-08
    • Yong Il KwonMyeung Su KimTah Joon Park
    • Yong Il KwonMyeung Su KimTah Joon Park
    • H04B1/06
    • H04B7/0814
    • An antenna diversity receiver includes a plurality of antennas, an antenna selector unit, an RF module unit, a logic gate unit, a power detector unit, and a selection controller unit. The antenna selector unit selects one of the antennas. The RF module unit converts an RF RX signal received from the antenna selector unit into a baseband RX signal. The logic gate unit controls a power detection mode for detecting the power levels of RX signals and an operation mode for selecting one of the antennas. The power detector unit detects the power level of the RX signal. The selection controller unit controls the antenna selector unit to sequentially select the antennas in the power detection mode, and controls the antenna selector unit to select the antenna with a relatively good RX sensitivity among the antennas.
    • 天线分集接收机包括多个天线,天线选择器单元,RF模块单元,逻辑门单元,功率检测单元和选择控制单元。 天线选择器单元选择一个天线。 RF模块单元将从天线选择器单元接收的RF RX信号转换为基带RX信号。 逻辑门单元控制用于检测RX信号的功率电平的功率检测模式和用于选择天线之一的操作模式。 功率检测器单元检测RX信号的功率电平。 选择控制器单元控制天线选择器单元在功率检测模式中顺序地选择天线,并且控制天线选择器单元选择天线之间具有相对良好的RX灵敏度的天线。
    • 2. 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。
    • 5. 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。
    • 6. 发明授权
    • Oscillation stabilization circuit
    • 振荡稳定电路
    • US07522009B2
    • 2009-04-21
    • US11808516
    • 2007-06-11
    • Yong Il KwonMyeung Su KimTah Joon Park
    • Yong Il KwonMyeung Su KimTah Joon Park
    • H03L1/00
    • H03L3/00
    • An oscillation stabilization detecting circuit comprises a T flip flop receiving a pulse-type oscillation signal generated by oscillating a crystal oscillator and then dividing the oscillation signal to output; a pulse control unit including inverters and transistors, the pulse control unit converting the signal output from the T flip flop into a pulse-type signal starting from a high level and then outputting the converted signal; and an oscillation stabilization detecting unit including a capacitor charged with the signal output from the pulse control unit; and a plurality of transistors. The oscillation stabilization detecting unit controls charging time of the capacitor by adjusting a bias current and, after the charging time passes, outputs a stabilization signal to a CPU, the stabilization signal representing that the oscillation signal is stabilized.
    • 振荡稳定检测电路包括:T触发器,接收通过振荡晶振产生的脉冲型振荡信号,然后将振荡信号分频输出; 脉冲控制单元,包括反相器和晶体管,所述脉冲控制单元将从所述T触发器输出的信号转换为从高电平开始的脉冲型信号,然后输出所述转换的信号; 以及振荡稳定检测单元,其包括充电了从脉冲控制单元输出的信号的电容器; 和多个晶体管。 振荡稳定检测单元通过调整偏置电流来控制电容器的充电时间,并且在充电时间过去之后,向CPU输出稳定信号,稳定信号表示振荡信号稳定。
    • 8. 发明申请
    • Oscillation stabilization circuit
    • 振荡稳定电路
    • US20070296514A1
    • 2007-12-27
    • US11808516
    • 2007-06-11
    • Yong Il KwonMyeung Su KimTah Joon Park
    • Yong Il KwonMyeung Su KimTah Joon Park
    • H03L7/099
    • H03L3/00
    • An oscillation stabilization detecting circuit comprises a T flip flop receiving a pulse-type oscillation signal generated by oscillating a crystal oscillator and then dividing the oscillation signal to output; a pulse control unit including inverters and transistors, the pulse control unit converting the signal output from the T flip flop into a pulse-type signal starting from a high level and then outputting the converted signal; and an oscillation stabilization detecting unit including a capacitor charged with the signal output from the pulse control unit; and a plurality of transistors. The oscillation stabilization detecting unit controls charging time of the capacitor by adjusting a bias current and, after the charging time passes, outputs a stabilization signal to a CPU, the stabilization signal representing that the oscillation signal is stabilized.
    • 振荡稳定检测电路包括:T触发器,接收通过振荡晶振产生的脉冲型振荡信号,然后将振荡信号分频输出; 脉冲控制单元,包括反相器和晶体管,所述脉冲控制单元将从所述T触发器输出的信号转换为从高电平开始的脉冲型信号,然后输出所述转换的信号; 以及振荡稳定检测单元,其包括充电了从脉冲控制单元输出的信号的电容器; 和多个晶体管。 振荡稳定检测单元通过调整偏置电流来控制电容器的充电时间,并且在充电时间过去之后,向CPU输出稳定信号,稳定信号表示振荡信号稳定。