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1. 发明授权

US08018292B2 Oscillator and communication system using the same 失效
标题翻译：振荡器和通信系统使用相同
公开(公告)号：US08018292B2
公开(公告)日：2011-09-13
申请号：US12222575
申请日：2008-08-12
申请人： Yusuke Wachi , Toshiyuki Nagasaku
发明人： Yusuke Wachi , Toshiyuki Nagasaku
IPC分类号： H03K3/282
CPC分类号： H03B5/1212 , H03B5/1228
摘要： A transfer impedance from input terminals of a resonator to output terminals of the resonator is larger than a driving-point impedance of the input terminals of the resonator at an oscillation frequency. The input terminals of the resonator are connected with the drain terminals of transistors Q1 and Q2 that are outputs of a differential amplifier, and the output terminals of the resonator are connected with gate terminals of the transistors Q1 and Q2 that are inputs of the differential amplifier. With this configuration, during the oscillating operation, the oscillation voltage amplitude of the gate terminals of the transistors Q1 and Q2 becomes larger than the oscillation voltage amplitude of the drain terminals. Therefore, it is possible to prevent the transistor, which is oscillating, from operating in a triode region, and suppress the deterioration of the Q-factor.
摘要翻译：从谐振器的输入端到谐振器的输出端的传输阻抗大于振荡频率下谐振器的输入端的驱动点阻抗。谐振器的输入端子与作为差分放大器的输出的晶体管Q1和Q2的漏极端子连接，谐振器的输出端子连接到作为差分放大器的输入的晶体管Q1和Q2的栅极端子。利用这种结构，在振荡操作期间，晶体管Q1和Q2的栅极端子的振荡电压振幅变得大于漏极端子的振荡电压振幅。因此，可以防止正在振荡的晶体管在三极管区域中工作，并且抑制Q因子的劣化。

2. 发明申请

US20090072920A1 Oscillator and communication system using the same 失效
标题翻译：振荡器和通信系统使用相同
公开(公告)号：US20090072920A1
公开(公告)日：2009-03-19
申请号：US12222575
申请日：2008-08-12
申请人： Yusuke Wachi , Toshiyuki Nagasaku
发明人： Yusuke Wachi , Toshiyuki Nagasaku
IPC分类号： H03B5/12 , H03B5/18
CPC分类号： H03B5/1212 , H03B5/1228
摘要： A transfer impedance from input terminals of a resonator to output terminals of the resonator is larger than a driving-point impedance of the input terminals of the resonator at an oscillation frequency. The input terminals of the resonator are connected with the drain terminals of transistors Q1 and Q2 that are outputs of a differential amplifier, and the output terminals of the resonator are connected with gate terminals of the transistors Q1 and Q2 that are inputs of the differential amplifier. With this configuration, during the oscillating operation, the oscillation voltage amplitude of the gate terminals of the transistors Q1 and Q2 becomes larger than the oscillation voltage amplitude of the drain terminals. Therefore, it is possible to prevent the transistor, which is oscillating, from operating in a triode region, and suppress the deterioration of the Q-factor.
摘要翻译：从谐振器的输入端到谐振器的输出端的传输阻抗大于振荡频率下谐振器的输入端的驱动点阻抗。谐振器的输入端子与作为差分放大器的输出的晶体管Q1和Q2的漏极端子连接，谐振器的输出端子连接到作为差分放大器的输入的晶体管Q1和Q2的栅极端子。利用这种结构，在振荡操作期间，晶体管Q1和Q2的栅极端子的振荡电压振幅变得大于漏极端子的振荡电压振幅。因此，可以防止正在振荡的晶体管在三极管区域中工作，并且抑制Q因子的劣化。

3. 发明授权

US08660502B2 High frequency antenna switch module 有权
标题翻译：高频天线开关模块
公开(公告)号：US08660502B2
公开(公告)日：2014-02-25
申请号：US13409451
申请日：2012-03-01
申请人： Yusuke Wachi , Takashi Kawamoto , Yuta Sugiyama
发明人： Yusuke Wachi , Takashi Kawamoto , Yuta Sugiyama
IPC分类号： H04B1/44
CPC分类号： H03K17/002 , H03K17/693 , H04B1/44
摘要： In a high frequency antenna switch module, an I/O interface generates various control signals for controlling a switch module on the basis of a system data signal and a system clock, a decoder generates a switch control signal SWCNT for controlling a switch in response to a control signal CNT in the control signals, a timing detector for switch-ports switching generates a switch-port switching detection signal t_sw in response to the switch control signal, a frequency control signal generator generates frequency control signals ICONT and CCONT in response to the signal t_sw, and a negative voltage generation circuit generates a negative voltage output signal NVG_OUT while switching the frequency of the clock signal generated in the negative voltage generation circuit to different frequencies in response to signals ICONT and CCONT. The switch switches the paths among the plural switch ports in response to the signals SWCNT and NVG_OUT.
摘要翻译：在高频天线切换模块中，I / O接口产生用于根据系统数据信号和系统时钟控制开关模块的各种控制信号，解码器产生用于响应于控制开关控制开关的开关控制信号SWCNT 控制信号中的控制信号CNT，用于开关端口切换的定时检测器响应于开关控制信号产生开关端口切换检测信号t_sw，频率控制信号发生器响应于该控制信号产生频率控制信号ICONT和CCONT 信号t_sw，并且负电压产生电路响应于信号ICONT和CCONT将负电压产生电路中产生的时钟信号的频率切换到不同的频率，产生负电压输出信号NVG_OUT。响应于信号SWCNT和NVG_OUT，开关切换多个开关端口中的路径。

4. 发明申请

US20120252377A1 HIGH FREQUENCY ANTENNA SWITCH MODULE 有权
标题翻译：高频天线开关模块
公开(公告)号：US20120252377A1
公开(公告)日：2012-10-04
申请号：US13409451
申请日：2012-03-01
申请人： Yusuke Wachi , Takashi Kawamoto , Yuta Sugiyama
发明人： Yusuke Wachi , Takashi Kawamoto , Yuta Sugiyama
IPC分类号： H04B1/44
CPC分类号： H03K17/002 , H03K17/693 , H04B1/44
摘要： In a high frequency antenna switch module, an I/O interface generates various control signals for controlling a switch module on the basis of a system data signal and a system clock, a decoder generates a switch control signal SWCNT for controlling a switch in response to a control signal CNT in the control signals, a timing detector for switch-ports switching generates a switch-port switching detection signal t_sw in response to the switch control signal, a frequency control signal generator generates frequency control signals ICONT and CCONT in response to the signal t_sw, and a negative voltage generation circuit generates a negative voltage output signal NVG_OUT while switching the frequency of the clock signal generated in the negative voltage generation circuit to different frequencies in response to signals ICONT and CCONT. The switch switches the paths among the plural switch ports in response to the signals SWCNT and NVG_OUT.
摘要翻译：在高频天线切换模块中，I / O接口产生用于根据系统数据信号和系统时钟控制开关模块的各种控制信号，解码器产生用于响应于控制开关控制开关的开关控制信号SWCNT 控制信号中的控制信号CNT，用于开关端口切换的定时检测器响应于开关控制信号产生开关端口切换检测信号t_sw，频率控制信号发生器响应于该控制信号产生频率控制信号ICONT和CCONT 信号t_sw，并且负电压产生电路响应于信号ICONT和CCONT将负电压产生电路中产生的时钟信号的频率切换到不同的频率，产生负电压输出信号NVG_OUT。响应于信号SWCNT和NVG_OUT，开关切换多个开关端口中的路径。

5. 发明授权

US08351867B2 Oscillator, frequency generating circuit and wireless communication system using the oscillator 有权
标题翻译：振荡器，频率发生电路和使用振荡器的无线通信系统
公开(公告)号：US08351867B2
公开(公告)日：2013-01-08
申请号：US12717122
申请日：2010-03-03
申请人： Yusuke Wachi
发明人： Yusuke Wachi
IPC分类号： H04B1/40
CPC分类号： H03L7/183 , H03B5/1203 , H03B5/1212 , H03B5/1228 , H03B5/1296 , H03B2200/007 , H03B2200/009 , H03L7/099
摘要： The present invention provides an oscillator and a communication system using the oscillator, in particular, an LC oscillator adapted to lessen phase noise deterioration due to harmonic distortions and increase the amplitude of oscillation, thereby having a favorable low phase noise characteristic. The oscillator comprises at least one voltage to current converter consisting of a transistor and a resonator comprising two LC tanks consisting of a pair of conductive elements and inductive elements. A feedback loop is formed such that an output terminal of the voltage to current converter is connected to the resonator and a current input to the resonator is converted to a voltage which is in turn fed back to an input terminal of the voltage to current converter. Inductive elements constituting the two LC tanks constituting the resonator are mutually inductively couple and a coefficient of the mutual induction is about −0.6.
摘要翻译：本发明提供一种使用该振荡器的振荡器和通信系统，特别是适用于减少由于谐波失真引起的相位噪声恶化并增加振荡幅度的LC振荡器，从而具有良好的低相位噪声特性。振荡器包括至少一个由晶体管和谐振器构成的电压 - 电流转换器，该谐振器包括由一对导电元件和电感元件组成的两个LC槽。形成反馈环路，使得电压 - 电流转换器的输出端子连接到谐振器，并且将谐振器的电流输入转换成电压，该电压又反馈到电压 - 电流转换器的输入端。构成谐振器的两个LC槽的感应元件是互感耦合的，互感系数约为-0.6。

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