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1. 发明申请

US20080036506A1 FREQUENCY SWITCHING METHOD 有权
标题翻译：频率切换方法
公开(公告)号：US20080036506A1
公开(公告)日：2008-02-14
申请号：US11836206
申请日：2007-08-09
申请人： Tin-Sing Lam , Chao-Tung Yang , Heng-Chih Lin , Shou-Fang Chen , Sining Zhou
发明人： Tin-Sing Lam , Chao-Tung Yang , Heng-Chih Lin , Shou-Fang Chen , Sining Zhou
IPC分类号： G01R23/02
CPC分类号： G06F1/08 , H03L7/099
摘要： A frequency switching method is used to make switching among a plurality of frequency signal sources each providing a specific frequency range covering multiple bands. The method includes steps of providing a target frequency data; selecting one of the frequency signal sources to output a first clock signal; generating a first frequency data according to the clock signal of the first frequency to compare with the target frequency data; outputting a second clock signal with the highest band of another one of the frequency signal sources possessing a frequency range higher than that of the selected frequency signal source when the target frequency data is greater than the first frequency data; and outputting the second clock signal with the lowest band of the selected frequency signal source when the target frequency data is smaller than the first frequency data.
摘要翻译：频率切换方法用于在多个频率信号源之间进行切换，每个频率信号源提供覆盖多个频带的特定频率范围。该方法包括提供目标频率数据的步骤; 选择频率信号源之一以输出第一时钟信号; 根据所述第一频率的时钟信号产生第一频率数据，以与所述目标频率数据进行比较; 当所述目标频率数据大于所述第一频率数据时，输出具有所述频率信号源中的另一个的最高频带的第二时钟信号，所述频率信号源具有高于所选择的频率信号源的频率范围的频率范围; 以及当所述目标频率数据小于所述第一频率数据时，将所述第二时钟信号输出到所选频率信号源的最低频带。

2. 发明申请

US20050266806A1 Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators 有权
标题翻译：具有独立可变RF和IF本地振荡器以及独立的高侧和低侧RF本地振荡器的多频带RF发射器和接收器
公开(公告)号：US20050266806A1
公开(公告)日：2005-12-01
申请号：US10856125
申请日：2004-05-28
申请人： Zaw Min Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
发明人： Zaw Min Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
IPC分类号： H04B1/06 , H04B1/40 , H04B7/00
CPC分类号： H04B1/403
摘要： Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.
摘要翻译：多级RF发射器和接收器电路可以使用独立可变的RF和IF本地振荡器，允许将给定RF通道的RF和IF本地振荡器频率选择为相对于本地振荡器电路使用的参考振荡器具有大的共同因子，从而允许在本地振荡器电路中使用小的除数，并减少相位噪声。独立的高侧和低端RF本地振荡器可以根据要发送或接收的RF信道来提供和选择性地使用。

3. 发明申请

US20050197089A1 Apparatus and method for dynamic DC offset detection and cancellation 有权
标题翻译：用于动态直流偏移检测和消除的装置和方法
公开(公告)号：US20050197089A1
公开(公告)日：2005-09-08
申请号：US10795076
申请日：2004-03-05
申请人： Sining Zhou
发明人： Sining Zhou
IPC分类号： H03F1/02 , H04B1/10 , H04B1/18
CPC分类号： H03D3/008 , H03D2200/0047 , H03F2200/375
摘要： A fixed impedance in parallel with a variable impedance form a high pass filter with a capacitor. An input signal is provided to the capacitor. The value of the variable impedance is controlled in relation to the magnitude of a dynamic DC offset in the input signal to control the corner frequency of the high pass filter, providing a higher corner frequency and more rapid suppression of dynamic DC offset for larger dynamic DC offset magnitudes.
摘要翻译：与可变阻抗并联的固定阻抗形成具有电容器的高通滤波器。输入信号提供给电容器。可变阻抗的值相对于输入信号中的动态DC偏移的幅度进行控制，以控制高通滤波器的转角频率，为较大的动态DC提供更高的转角频率和更快速的动态DC偏移抑制偏移量。

4. 发明申请

US20070218851A1 Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators 审中-公开
公开(公告)号：US20070218851A1
公开(公告)日：2007-09-20
申请号：US11804516
申请日：2007-05-16
申请人： Zaw Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
发明人： Zaw Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
IPC分类号： H04B1/16
CPC分类号： H04B1/403
摘要： Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.

5. 发明授权

US07266352B2 Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators 有权
标题翻译：具有独立可变RF和IF本地振荡器以及独立的高侧和低侧RF本地振荡器的多频带RF发射器和接收器
公开(公告)号：US07266352B2
公开(公告)日：2007-09-04
申请号：US10856125
申请日：2004-05-28
申请人： Zaw Min Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
发明人： Zaw Min Soe , Tony Yang , Jackie Cheng , Sining Zhou , Kuangyu Li , Fei-Ran Yang , Shoufang Chen , Tom Baker
IPC分类号： H04B1/16
CPC分类号： H04B1/403
摘要： Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.
摘要翻译：多级RF发射器和接收器电路可以使用独立可变的RF和IF本地振荡器，允许将给定RF通道的RF和IF本地振荡器频率选择为相对于本地振荡器电路使用的参考振荡器具有大的共同因子，从而允许在本地振荡器电路中使用小的除数，并减少相位噪声。独立的高侧和低端RF本地振荡器可以根据要发送或接收的RF信道来提供和选择性地使用。

6. 发明授权

US07184736B2 Apparatus and method for dynamic DC offset detection and cancellation using high pass filter with variable impedance and corner frequency 有权
标题翻译：使用具有可变阻抗和转角频率的高通滤波器进行动态DC偏移检测和消除的装置和方法
公开(公告)号：US07184736B2
公开(公告)日：2007-02-27
申请号：US10795076
申请日：2004-03-05
申请人： Sining Zhou
发明人： Sining Zhou
IPC分类号： H04B1/10
CPC分类号： H03D3/008 , H03D2200/0047 , H03F2200/375
摘要： A fixed impedance in parallel with a variable impedance form a high pass filter with a capacitor. An input signal is provided to the capacitor. The value of the variable impedance is controlled in relation to the magnitude of a dynamic DC offset in the input signal to control the corner frequency of the high pass filter, providing a higher corner frequency and more rapid suppression of dynamic DC offset for larger dynamic DC offset magnitudes.
摘要翻译：与可变阻抗并联的固定阻抗形成具有电容器的高通滤波器。输入信号提供给电容器。可变阻抗的值相对于输入信号中的动态DC偏移的幅度进行控制，以控制高通滤波器的转角频率，为较大的动态DC提供更高的转角频率和更快速的动态DC偏移抑制偏移量。

7. 发明授权

US07548120B2 Frequency switching method 有权
标题翻译：频率切换方式
公开(公告)号：US07548120B2
公开(公告)日：2009-06-16
申请号：US11836206
申请日：2007-08-09
申请人： Tin-Sing Lam , Chao-Tung Yang , Heng-Chih Lin , Shou-Fang Chen , Sining Zhou
发明人： Tin-Sing Lam , Chao-Tung Yang , Heng-Chih Lin , Shou-Fang Chen , Sining Zhou
IPC分类号： H03L7/00
CPC分类号： G06F1/08 , H03L7/099
摘要： A frequency switching method is used to make switching among a plurality of frequency signal sources each providing a specific frequency range covering multiple bands. The method includes steps of providing a target frequency data; selecting one of the frequency signal sources to output a first clock signal; generating a first frequency data according to the clock signal of the first frequency to compare with the target frequency data; outputting a second clock signal with the highest band of another one of the frequency signal sources possessing a frequency range higher than that of the selected frequency signal source when the target frequency data is greater than the first frequency data; and outputting the second clock signal with the lowest band of the selected frequency signal source when the target frequency data is smaller than the first frequency data.
摘要翻译：频率切换方法用于在多个频率信号源之间进行切换，每个频率信号源提供覆盖多个频带的特定频率范围。该方法包括提供目标频率数据的步骤; 选择频率信号源之一以输出第一时钟信号; 根据所述第一频率的时钟信号产生第一频率数据，以与所述目标频率数据进行比较; 当所述目标频率数据大于所述第一频率数据时，输出具有所述频率信号源中的另一个的最高频带的第二时钟信号，所述频率信号源具有高于所选择的频率信号源的频率范围的频率范围; 以及当所述目标频率数据小于所述第一频率数据时，将所述第二时钟信号输出到所选频率信号源的最低频带。

8. 发明授权

US07277682B2 RF passive mixer with DC offset tracking and local oscillator DC bias level-shifting network for reducing even-order distortion 有权
标题翻译： RF无源混频器，具有直流偏移跟踪和本地振荡器直流偏置电平转换网络，可减少偶次失真
公开(公告)号：US07277682B2
公开(公告)日：2007-10-02
申请号：US10147699
申请日：2002-05-16
申请人： Sining Zhou
发明人： Sining Zhou
IPC分类号： H01Q11/12
CPC分类号： H03D7/1441 , H03D7/1466 , H03D7/1491 , H03D2200/0047 , H04B1/30
摘要： An apparatus and method for tracking a DC offset in a mixer circuit used in wireless communication systems and for providing local oscillator DC bias level-shifting to reduce even order distortion resulting from the DC offset is described. The apparatus has an input coupled to a mixer circuit output for receiving a DC voltage present on the mixer circuit output. The DC voltage includes an offset component. A level shifting circuit is coupled to the input for level shifting the received DC voltage a predetermined amount. An output of the level shifting circuit is coupled to a local oscillator input for outputting the level shifted DC voltage to the local oscillator input. The shift in the DC bias level at the local oscillator input of the mixer circuit provided by the apparatus and method reduces even order distortion in the mixer circuit, including second order intermodulation (IM2) distortion.
摘要翻译：描述用于跟踪在无线通信系统中使用的混频器电路中的DC偏移并用于提供本地振荡器DC偏置电平移位以减少由DC偏移引起的偶数阶失真的装置和方法。该装置具有耦合到混频器电路输出的输入端，用于接收混频器电路输出端上存在的直流电压。直流电压包括偏移分量。电平移位电路耦合到输入端，用于将接收到的直流电压电平移位预定量。电平移位电路的输出耦合到本地振荡器输入，用于将电平移位的DC电压输出到本地振荡器输入。由设备和方法提供的混频器电路的本地振荡器输入端的直流偏置电平的偏移降低了混频器电路中的偶数阶失真，包括二阶互调（IM2）失真。

9. 发明授权

US06847808B2 Ultra-high linearity RF passive mixer 有权
标题翻译：超高线性RF无源混频器
公开(公告)号：US06847808B2
公开(公告)日：2005-01-25
申请号：US10086937
申请日：2002-02-28
申请人： Sining Zhou
发明人： Sining Zhou
IPC分类号： H03D7/14 , H04B1/18
CPC分类号： H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D2200/0088
摘要： A CMOS implemented passive mixer circuit for improving linearity performance in wireless communication systems is described, including dual pairs of NMOS FETs and dual pairs of PMOS FETs. Each NMOS FET is connected in parallel with a corresponding PMOS FET. A local oscillator signal is provided to the gate of one FET while a 180-degree phase shifted local oscillator signal is provided to the gate of its complementary FET. Because the complementary FETs are driven by local oscillator signals that are 180 degrees out of phase, the NMOS FET is turned on for at least a portion of the positive cycle of the local oscillator signal and the PMOS FET is turned on for at least a portion of the negative cycle of the 180-degree phase shifted local oscillator signal. Distortion in the mixed output signal is thereby reduced.
摘要翻译：描述了CMOS实现的无源混频器电路，用于改善无线通信系统中的线性性能，包括双对NMOS FET和双对PMOS FET。每个NMOS FET与相应的PMOS FET并联连接。本地振荡器信号提供给一个FET的栅极，而180度相移本地振荡器信号提供给其互补FET的栅极。由于互补FET由相位为180度的本地振荡器信号驱动，NMOS FET导通本地振荡器信号的正周期的至少一部分，并且PMOS FET导通至少一部分的180度相移本地振荡器信号的负周期。因此混合输出信号的失真减小。

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