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1. 发明申请

US20070085602A1 High-efficiency mixed-mode power amplifier 有权
标题翻译：高效率混合模式功率放大器
公开(公告)号：US20070085602A1
公开(公告)日：2007-04-19
申请号：US11482576
申请日：2006-07-07
申请人： Min Park , Yun Choi , Kyung Park , Seok Hyun , Seong Park
发明人： Min Park , Yun Choi , Kyung Park , Seok Hyun , Seong Park
IPC分类号： H03F1/14 , H03F3/68
CPC分类号： H03F1/0222 , H03F1/0277
摘要： Provided is a power amplifier of a low-power consumption system that has linearity at a peak output power while increasing efficiency in a most frequently used range, and thereby enables a battery to last longer. The power amplifier includes an input impedance matcher for impedance-matching a signal input from the outside; a high-power amplifier and a low-power amplifier for amplifying the signal having passed through the input impedance matcher; an amplification controller controlling the high-power amplifier and low-power amplifier according to the power level of the input signal; an output impedance matcher for impedance-matching the signal amplified by the high-power amplifier and low-power amplifier; and a dynamic voltage supplier for supplying the low-power amplifier with a variable driving voltage. With the constitution set forth above, linearity at peak output power is maintained, and efficiency increases in the most frequently used range, thereby enabling the battery of a handheld to last longer.
摘要翻译：提供了一种低功耗系统的功率放大器，其在峰值输出功率下具有线性度，同时提高了最常用范围内的效率，从而使得电池能够持续更长时间。功率放大器包括用于阻抗匹配从外部输入的信号的输入阻抗匹配器; 大功率放大器和用于放大已经通过输入阻抗匹配器的信号的低功率放大器; 放大控制器根据输入信号的功率电平控制大功率放大器和低功率放大器; 用于阻抗匹配由大功率放大器和低功率放大器放大的信号的输出阻抗匹配器; 以及用于向低功率放大器供应可变驱动电压的动态电压供应器。根据上述结构，保持峰值输出功率的线性度，并且在最常用的范围内效率增加，从而使得手持式电池的持续时间更长。

2. 发明申请

US20070096842A1 Digitally controlled circulator and radio frequency identification reader having the same 有权
标题翻译：具有相同数字控制的循环器和射频识别读取器
公开(公告)号：US20070096842A1
公开(公告)日：2007-05-03
申请号：US11499440
申请日：2006-08-04
申请人： Seok Hyun , Kyung Park , Tae Kang , Seong Park
发明人： Seok Hyun , Kyung Park , Tae Kang , Seong Park
IPC分类号： H01P1/32
CPC分类号： H03H7/52
摘要： Provided are a digitally controlled circulator and a radio frequency identification (RFID) reader having the circulator. A power splitter is composed of lumped elements and the values of the elements are digitally changed using switching means, in which the transmission loss of a signal is controlled according to whether the reader is in a transmission state or a reception state. Therefore, the loss can be minimized, and the circulator can be miniaturized and priced down by an integrated circuit (IC) semiconductor process and mounted in a mobile terminal such as a cellular phone.
摘要翻译：提供了一种数字控制循环器和具有循环器的射频识别（RFID）读取器。功率分配器由集总元件组成，并且使用切换装置对元件的值进行数字改变，其中根据读取器是处于传输状态还是接收状态来控制信号的传输损耗。因此，可以使损耗最小化，并且可以通过集成电路（IC）半导体工艺将循环器小型化和定价，并且安装在诸如蜂窝电话的移动终端中。

3. 发明申请

US20070220394A1 Low-complexity and low-power-consumption turbo decoder with variable scaling factor 有权
标题翻译：具有可变比例因子的低复杂度和低功耗Turbo解码器
公开(公告)号：US20070220394A1
公开(公告)日：2007-09-20
申请号：US11701956
申请日：2007-02-02
申请人： Byung Kim , Seok Hyun , Seong Park , Jae Kim , Hyun Park , Jong Seo
发明人： Byung Kim , Seok Hyun , Seong Park , Jae Kim , Hyun Park , Jong Seo
IPC分类号： H03M13/00
CPC分类号： H03M13/2975 , H03M13/6502 , H03M13/658
摘要： Provided is a low-complexity and low-power-consumption turbo decoder with a variable scaling factor. The performance of the turbo decoder is enhanced by evaluating a decoding convergence degree of the turbo decoder using a sign difference ratio (SDR) value, limiting the iterative-decoding number, and calculating and applying a variable scaling factor producing optimal performance in each decoding convergence area based on the SDR value, and power consumption is reduced by reducing the average number of decoding iterations. Thus, the performance degradation when the encoded block is large, which is a shortcoming of a conventional EMLMAP algorithm, can be prevented, the average number of decoding iterations can be reduced, and accordingly power consumption can be reduced.
摘要翻译：提供了具有可变缩放因子的低复杂度和低功耗turbo解码器。通过使用符号差分比（SDR）值评估turbo解码器的解码收敛度，限制迭代解码数，并且在每个解码收敛中计算和应用产生最佳性能的可变缩放因子来增强turbo解码器的性能基于SDR值的区域，并且通过减少平均解码次数减少功耗。因此，可以防止编码块大时的性能下降，这是常规EMLMAP算法的缺点，可以减少平均解码次数，因此能够降低功耗。

4. 发明申请

US20060126492A1 Method and apparatus for transmitting data based on OFDM 有权
公开(公告)号：US20060126492A1
公开(公告)日：2006-06-15
申请号：US11299184
申请日：2005-12-09
申请人： Seok Hyun , Byung Kim , Seong Park
发明人： Seok Hyun , Byung Kim , Seong Park
IPC分类号： H04J11/00 , H04J1/00
CPC分类号： H04L1/0007 , H04L1/0017 , H04L1/009
摘要： Provided is a method and apparatus for transmitting data based on OFDM (Orthogonal Frequency Division Multiplexing). The method includes: forming a plurality of packets suitable for a selected transmission mode from data input to a transmitter; determining a transfer rate of the data; when the data transfer rate is determined to be low and synchronous connection oriented link should be maintained, dividing each of the plurality of packets into a plurality of sub-packets; and transmitting the divided sub-packets, wherein when the divided sub-packets are transmitted, a power supply duration of the transmitter is reduced by using a DPM (dynamic power management) or fine state control unit.

5. 发明申请

US20060088122A1 Direct-conversion frequency mixer 有权
标题翻译：直接转换混频器
公开(公告)号：US20060088122A1
公开(公告)日：2006-04-27
申请号：US11226045
申请日：2005-09-14
申请人： Byoung Choi , Seok Hyun , Geum Tak , Hee Lee , Seong-Su Park , Chul Park
发明人： Byoung Choi , Seok Hyun , Geum Tak , Hee Lee , Seong-Su Park , Chul Park
IPC分类号： H04L27/18
CPC分类号： H03D7/1441 , H03D7/1491 , H03D7/165 , H03D2200/0084
摘要： Provided is a direct-conversion frequency mixer for down converting a radio frequency (RF) signal into a baseband signal, in which a single phase RF signal and a quadrature location oscillation (quadrature LO) signal are used to generate the baseband signal, the frequency mixer comprising a first frequency mixing unit that uses quadrature LO signals having respective phases of 0 degrees and 180 degrees to directly down-convert the single phase RF signal into the in-phase baseband signal, and a second frequency mixing unit that uses quadrature LO signals having respective phases of 90 degrees and 270 degrees to directly down-convert the single phase RF signal into the quadrature-phase baseband signal, whereby drains and sources of the transistor for receiving the quadrature LO signaland the transistor for receiving the RF signal are connected in common, thus enabling low power source voltage driving.
摘要翻译：提供了一种用于将射频（RF）信号下变频为基带信号的直接转换混频器，其中使用单相RF信号和正交位置振荡（正交LO）信号来产生基带信号，频率混频器，其包括使用具有0度和180度的相位的正交LO信号的第一频率混合单元，以将单相RF信号直接下变频为同相基带信号;以及第二混频单元，其使用正交LO信号具有90度和270度的各个相位以将单相RF信号直接下变频为正交相位基带信号，由此用于接收正交LO信号的晶体管的漏极和源极以及用于接收RF信号的晶体管被连接在通用，从而实现低电源电压驱动。

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