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1. 发明申请

US20060009180A1 RF receiver mismatch calibration system and method 有权
标题翻译： RF接收机不匹配校准系统和方法
公开(公告)号：US20060009180A1
公开(公告)日：2006-01-12
申请号：US10887702
申请日：2004-07-09
申请人： Zhiwei Xu , Shan Jiang , Charles Chien
发明人： Zhiwei Xu , Shan Jiang , Charles Chien
IPC分类号： H04B17/00
CPC分类号： H04B1/28 , H04B1/0039 , H04B17/21
摘要： A calibration system for an RF system that includes an RF receiver capable of operating in a normal mode and in a calibration mode. The calibration system includes a phase delay unit provided on at least one of an I channel output and a Q channel output of the RF receiver. The system further includes a phase detector configured to detect a phase difference between the I channel output of the RF receiver and the Q channel output of the RF receiver. The system also includes a calibration control unit configured to provide a digital calibration control signal to the RF receiver based on the phase difference as provided by the phase detector.
摘要翻译：一种用于RF系统的校准系统，其包括能够以正常模式和校准模式操作的RF接收器。校准系统包括设置在RF接收器的I通道输出和Q通道输出中的至少一个上的相位延迟单元。该系统还包括相位检测器，被配置为检测RF接收机的I信道输出与RF接收机的Q信道输出之间的相位差。该系统还包括校准控制单元，其被配置为基于由相位检测器提供的相位差向RF接收器提供数字校准控制信号。

2. 发明授权

US07254379B2 RF receiver mismatch calibration system and method 有权
标题翻译： RF接收机不匹配校准系统和方法
公开(公告)号：US07254379B2
公开(公告)日：2007-08-07
申请号：US10887702
申请日：2004-07-09
申请人： Zhiwei Xu , Shan Jiang , Charles Chien
发明人： Zhiwei Xu , Shan Jiang , Charles Chien
IPC分类号： H04B1/10 , H04B17/00 , H04L1/00
CPC分类号： H04B1/28 , H04B1/0039 , H04B17/21
摘要： A calibration system for an RF system that includes an RF receiver capable of operating in a normal mode and in a calibration mode. The calibration system includes a phase delay unit provided on at least one of an I channel output and a Q channel output of the RF receiver. The system further includes a phase detector configured to detect a phase difference between the I channel output of the RF receiver and the Q channel output of the RF receiver. The system also includes a calibration control unit configured to provide a digital calibration control signal to the RF receiver based on the phase difference as provided by the phase detector.
摘要翻译：一种用于RF系统的校准系统，其包括能够以正常模式和校准模式操作的RF接收器。校准系统包括设置在RF接收器的I通道输出和Q通道输出中的至少一个上的相位延迟单元。该系统还包括相位检测器，被配置为检测RF接收机的I信道输出与RF接收机的Q信道输出之间的相位差。该系统还包括校准控制单元，其被配置为基于由相位检测器提供的相位差向RF接收器提供数字校准控制信号。

3. 发明授权

US07280805B2 LO leakage and sideband image calibration system and method 有权
标题翻译： LO泄漏和边带图像校准系统及方法
公开(公告)号：US07280805B2
公开(公告)日：2007-10-09
申请号：US10888842
申请日：2004-07-09
申请人： Zhiwei Xu , Shan Jiang , Charles Chien
发明人： Zhiwei Xu , Shan Jiang , Charles Chien
IPC分类号： H04B17/00 , H03C1/62
CPC分类号： H04B1/0475
摘要： A system or method for calibrating an RF transmitter includes inputting a test tone to the RF transmitter. LO leakage calibration is performed on an output of the RF transmitter with the test tone inputted thereto, in order to determine a minimum LO leakage. Thereafter, sideband image calibration is performed on the output of the RF transmitter with the test tone inputted thereto, in order to determine a minimum sideband image. Operational values for the RF transmitter are stored in memory based on the detected minimum LO leakage and the detected minimum sideband image, to be used during a normal operation mode of the RF transmitter.
摘要翻译：用于校准RF发射机的系统或方法包括将测试音调输入到RF发射机。在输入了测试音的RF发射机的输出上执行LO泄漏校准，以便确定最小的LO泄漏。此后，对输入了测试音的RF发射机的输出执行边带图像校准，以便确定最小边带图像。基于检测到的最小LO泄漏和检测到的最小边带图像将RF发射机的操作值存储在存储器中，以在RF发射机的正常操作模式期间使用。

4. 发明申请

US20060009171A1 LO leakage and sideband image calibration system and method 有权
标题翻译： LO泄漏和边带图像校准系统及方法
公开(公告)号：US20060009171A1
公开(公告)日：2006-01-12
申请号：US10888842
申请日：2004-07-09
申请人： Zhiwei Xu , Shan Jiang , Charles Chien
发明人： Zhiwei Xu , Shan Jiang , Charles Chien
IPC分类号： H04B1/02 , H04B1/04
CPC分类号： H04B1/0475
摘要： A system or method for calibrating an RF transmitter includes inputting a test tone to the RF transmitter. LO leakage calibration is performed on an output of the RF transmitter with the test tone inputted thereto, in order to determine a minimum LO leakage. Thereafter, sideband image calibration is performed on the output of the RF transmitter with the test tone inputted thereto, in order to determine a minimum sideband image. Operational values for the RF transmitter are stored in memory based on the detected minimum LO leakage and the detected minimum sideband image, to be used during a normal operation mode of the RF transmitter.
摘要翻译：用于校准RF发射机的系统或方法包括将测试音调输入到RF发射机。在输入了测试音的RF发射机的输出上执行LO泄漏校准，以便确定最小的LO泄漏。此后，对输入了测试音的RF发射机的输出执行边带图像校准，以便确定最小边带图像。基于检测到的最小LO泄漏和检测到的最小边带图像将RF发射机的操作值存储在存储器中，以在RF发射机的正常操作模式期间使用。

5. 发明授权

US07860470B2 Cross coupled high frequency buffer 有权
标题翻译：交叉耦合高频缓冲器
公开(公告)号：US07860470B2
公开(公告)日：2010-12-28
申请号：US11781198
申请日：2007-07-20
申请人： Zhiwei Xu , Heng-Yu Jian , Yi-Cheng Wu , Charles Chien
发明人： Zhiwei Xu , Heng-Yu Jian , Yi-Cheng Wu , Charles Chien
IPC分类号： H03J7/32
CPC分类号： H04B1/30 , H03F3/245 , H03F3/45183 , H03F3/45237 , H03F2203/45631 , H03F2203/45638
摘要： A local oscillator (LO) buffer circuit comprises first and second LO buffers arranged in a cross coupled configuration. The first LO buffer generates in-phase output signals in response to in-phase input signals, and quadrature output signals from the second LO buffer. The second LO buffer generates the quadrature output signals in response to quadrature input signals and the in-phase output signals. The LO buffers may include inductive loads. The LO buffers may include MOS transistors or bipolar junction transistors.
摘要翻译：本地振荡器（LO）缓冲电路包括以交叉耦合配置布置的第一和第二LO缓冲器。第一LO缓冲器响应于同相输入信号和来自第二LO缓冲器的正交输出信号产生同相输出信号。第二LO缓冲器响应于正交输入信号和同相输出信号产生正交输出信号。 LO缓冲器可以包括感性负载。 LO缓冲器可以包括MOS晶体管或双极结型晶体管。

6. 发明授权

US07609122B2 Method and system for calibration of a tank circuit in a phase lock loop 有权
标题翻译：在锁相环中调节电路的方法和系统
公开(公告)号：US07609122B2
公开(公告)日：2009-10-27
申请号：US11868306
申请日：2007-10-05
申请人： Heng-Yu Jian , Zhiwei Xu , Yi-Cheng Wu , Charles Chien
发明人： Heng-Yu Jian , Zhiwei Xu , Yi-Cheng Wu , Charles Chien
IPC分类号： H03B5/08
CPC分类号： H03L7/10 , H03L7/099
摘要： A phase lock loop (PLL) includes a calibration loop for calibrating a tank circuit for capacitance variation through process variations of manufacturing an integrated circuit including the PLL. A capacitance profile for setting the frequency of the PLL at a process comer is stored. At power up, or after an idle time, a calibration is performed at two frequencies. The capacitances of operating the phase lock loop at the two frequencies are determined and stored. During a frequency change, the capacitance of operating the PLL is determined from the capacitance profile and stored capacitances. The capacitance of the PLL is presumed to change linearly with frequency and the two stored capacitances are used to determine a difference capacitance at the selected frequency by linear interpolating between the two stored capacitances, which is added to the capacitance in the capacitance profile at the selected frequency to generate an operating capacitance.
摘要翻译：锁相环（PLL）包括用于通过制造包括PLL的集成电路的过程变化校准用于电容变化的振荡电路的校准回路。存储用于在处理角设定PLL的频率的电容分布。在上电或空闲时间后，以两个频率进行校准。确定并存储在两个频率下操作锁相环的电容。在频率变化期间，操作PLL的电容由电容曲线和存储的电容确定。假设PLL的电容随频率线性变化，并且两个存储的电容用于通过在所选择的电容分布中的电容相加的两个存储的电容之间的线性内插来确定所选频率处的差电容，产生一个工作电容的频率。

7. 发明申请

US20090091396A1 METHOD AND SYSTEM FOR CALIBRATION OF A TANK CIRCUIT IN A PHASE LOCK LOOP 有权
标题翻译：用于在相位锁定环中校准电路的方法和系统
公开(公告)号：US20090091396A1
公开(公告)日：2009-04-09
申请号：US11868306
申请日：2007-10-05
申请人： Heng-Yu Jian , Zhiwei Xu , Yi-Cheng Wu , Charles Chien
发明人： Heng-Yu Jian , Zhiwei Xu , Yi-Cheng Wu , Charles Chien
IPC分类号： H03L7/099 , H03L7/08
CPC分类号： H03L7/10 , H03L7/099
摘要： A phase lock loop includes a calibration loop for calibrating a tank circuit for capacitance variation through process variations of manufacturing an integrated circuit including the phase lock loop. A capacitance profile for setting the frequency of the phase lock loop at a process corner, such as a typical process corner is stored in driver software or a host processor. At power up, or after an idle time, a calibration is performed at two frequencies. The capacitances of operating the phase lock loop at the two frequencies are determined and stored. During a frequency change, the capacitance of operating the phase lock loop is determined from the capacitance profile and stored capacitances. In one aspect, the capacitance of the phase lock loop is presumed to change linearly with frequency and the two stored capacitances are used to determine a difference capacitance at the selected frequency by linear interpolating between the two stored capacitances. The interpolated difference capacitance is added to the capacitance in the capacitance profile at the selected frequency to generate an operating capacitance. The capacitance of a tank circuit of the phase lock loop is set to the operating capacitance.
摘要翻译：锁相环包括用于通过制造包括锁相环的集成电路的过程变化来校准用于电容变化的储能电路的校准回路。用于设置过程角（例如典型过程角）的锁相环频率的电容分布存储在驱动软件或主机处理器中。在上电或空闲时间后，以两个频率进行校准。确定并存储在两个频率下操作锁相环的电容。在频率变化期间，根据电容曲线和存储的电容确定操作锁相环的电容。在一个方面，假设锁相环的电容随频率线性变化，并且两个存储的电容用于通过两个存储电容之间的线性内插来确定所选频率处的差电容。内插差分电容以所选频率加到电容分布中的电容上，以产生一个工作电容。锁相环的电路电容设定为工作电容。

8. 外观设计

USD443379S1 Lantern 失效
公开(公告)号：USD443379S1
公开(公告)日：2001-06-05
申请号：US29112410
申请日：1999-10-14
申请人： Zhiwei Xu , Brian Graves , Joseph Manno
设计人： Zhiwei Xu , Brian Graves , Joseph Manno

9. 外观设计

USD433620S Finial 失效
公开(公告)号：USD433620S
公开(公告)日：2000-11-14
申请号：US114063
申请日：1999-11-17
申请人： Zhiwei Xu , Brian Graves
设计人： Zhiwei Xu , Brian Graves

10. 外观设计

USD432398S Finial 失效
公开(公告)号：USD432398S
公开(公告)日：2000-10-24
申请号：US109584
申请日：1999-08-18
申请人： Brain Graves , Zhiwei Xu
设计人： Brain Graves , Zhiwei Xu

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