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    • 43. 发明授权
    • Oscillator
    • 振荡器
    • US08264293B2
    • 2012-09-11
    • US12844686
    • 2010-07-27
    • Seok Ju YunHui Dong LeeKwi Dong KimJong Kee Kwon
    • Seok Ju YunHui Dong LeeKwi Dong KimJong Kee Kwon
    • H03B5/08
    • H03B5/1228H03B5/1215H03B5/1218H03B5/1225H03B5/1253H03B5/1296
    • Provided is a transformer-based oscillator which is suited to oscillate frequencies in multiple bands. An oscillator includes a transformer resonance unit and a plurality of complementary transistors. The transformer resonance unit includes a primary coil and a secondary coil corresponding to the primary coil. The plurality of complementary transistors have gates and drains between which both ends of the transformer resonance unit are respectively connected. Thus, the oscillator may operate in a differential mode or common mode according to the phase of the transformer resonance unit. Also, a complementary transistor constituting a multiband oscillation loop may be independently connected to both ends of the transformer resonance unit, and an oscillation loop of at least one band may be selected out of a multiband oscillation loop using a switch unit. Thus, the oscillator may be suited to oscillate resonance frequencies in multiple bands.
    • 提供了一种适用于在多个频带中振荡频率的基于变压器的振荡器。 振荡器包括变压器谐振单元和多个互补晶体管。 变压器谐振单元包括初级线圈和对应于初级线圈的次级线圈。 多个互补晶体管具有分别连接变压器谐振单元的两端的栅极和漏极。 因此,振荡器可以根据变压器谐振单元的相位以差模或共模工作。 此外,构成多频带振荡回路的互补晶体管可以独立地连接到变压器谐振单元的两端,并且可以使用开关单元从多频带振荡回路中选择至少一个频带的振荡回路。 因此,振荡器可以适合于振荡多个频带中的谐振频率。
    • 45. 发明授权
    • Digital-to-analog converter
    • 数模转换器
    • US08059022B2
    • 2011-11-15
    • US12773768
    • 2010-05-04
    • Young Kyun ChoYoung Deuk JeonJae Won NamJong Kee Kwon
    • Young Kyun ChoYoung Deuk JeonJae Won NamJong Kee Kwon
    • H03M1/66
    • H03M1/0682H03M1/468H03M1/68H03M1/682H03M1/804H03M1/806
    • A digital-to-analog converter (DAC) is provided. The DAC includes a positive converter, a negative converter, and a comparator for receiving outputs of the positive converter and the negative converter, comparing the outputs with a reference voltage, and generating an output voltage. Each of the positive converter and the negative converter includes an upper-bit converter including a plurality of bit capacitors corresponding to respective upper bits, a lower-bit converter including a plurality of bit capacitors corresponding to respective lower bits, and a coupling capacitor for connecting the upper-bit converter with the lower-bit converter in series. Each of the positive converter and the negative converter receives a bias voltage to have a uniform offset when converting the respective bits. Accordingly, it is possible to obtain a high resolution using a small area. Also, the number of capacitors can be reduced, and the capacitance of a unit capacitor can be maximized. Consequently, it is possible to minimize heat noise and device mismatching.
    • 提供了数模转换器(DAC)。 DAC包括正转换器,负转换器和用于接收正转换器和负转换器的输出的比较器,将输出与参考电压进行比较,并产生输出电压。 正转换器和负转换器中的每个包括具有对应于各高位的多个位电容器的高位转换器,包括对应于各低位的多个位电容器的低位转换器和用于连接的耦合电容器 低位转换器与低位转换器串联。 正转换器和负转换器中的每一个在转换各个位时接收偏置电压以具有均匀的偏移。 因此,可以使用小面积获得高分辨率。 此外,可以减少电容器的数量,并且可以使单位电容器的电容最大化。 因此,可以最小化热噪声和器件不匹配。
    • 50. 发明申请
    • SUCCESSIVE APPROXIMATION REGISTER ANALOG-DIGITAL CONVERTER AND METHOD OF DRIVING THE SAME
    • 连续逼近寄存器模拟数字转换器及其驱动方法
    • US20100123611A1
    • 2010-05-20
    • US12472375
    • 2009-05-27
    • Young Kyun ChoYoung Deuk JeonJae Won NamJong Kee Kwon
    • Young Kyun ChoYoung Deuk JeonJae Won NamJong Kee Kwon
    • H03M1/12
    • H03M1/069H03M1/0607H03M1/468H03M1/804
    • A successive approximation register (SAR) analog-digital converter (ADC) and a method of driving the same are provided. The SAR ADC includes a first converting unit including a bit capacitor array corresponding to the number of bits and a correction capacitor array, a comparator outputting a high or low voltage corresponding to each capacitor according to an output voltage of the converting unit, and a correction unit correcting the output of the bit capacitor according to the output of the correction capacitor array among the high or low output of the comparator. Therefore, two bits having the same capacitance as a least significant bit (LSB) enable a digital output error to be corrected, so that a spurious free dynamic range (SFDR) of the signal converter is increased, and a signal to noise and distortion ratio (SNDR) of an output signal is improved.
    • 提供逐次逼近寄存器(SAR)模数转换器(ADC)及其驱动方法。 SAR ADC包括:第一转换单元,包括与位数相对应的位电容阵列和校正电容器阵列;比较器,根据转换单元的输出电压输出对应于每个电容器的高电压或低电压;以及校正 单元根据比较器的高或低输出中的校正电容器阵列的输出校正位电容器的输出。 因此,具有与最低有效位(LSB)相同的电容的两个位使得能够校正数字输出误差,使得信号转换器的无杂散动态范围(SFDR)增加,并且信噪比和失真比 (SNDR)的输出信号得到改善。