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公开(公告)号：US07366489B2
公开(公告)日：2008-04-29
申请号：US10742813
申请日：2003-12-23
申请人： Satoshi Tanaka , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
发明人： Satoshi Tanaka , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
CPC分类号： H04B1/30 , H03D2200/0047 , H03K21/16
摘要： A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.
摘要翻译： 适合较大规模集成的收发器采用直接转换接收，以减少滤波器的数量。 此外，通过利用分频器来为RF频带提供具有本地振荡信号的接收机和发射机来减少VCO的数量。 每个具有固定分频比的分频器用于产生用于接收机的局部振荡信号，而具有可切换分频比的分频器用于产生用于发射机的本地振荡信号。 另外，用于基带信号的可变增益放大器设置有DC偏移电压检测器和DC偏移消除电路，用于支持高速数据通信以通过消除用于偏移的反馈回路内的滤波器的干涉来实现DC偏移的快速消除 消除。
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公开(公告)号：US08107912B2
公开(公告)日：2012-01-31
申请号：US12975488
申请日：2010-12-22
申请人： Satoshi Tanaka , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
发明人： Satoshi Tanaka , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
CPC分类号： H04B1/30 , H03D2200/0047 , H03K21/16
摘要： A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.
摘要翻译： 适合较大规模集成的收发器采用直接转换接收，以减少滤波器的数量。 此外，通过利用分频器来为RF频带提供具有本地振荡信号的接收机和发射机来减少VCO的数量。 每个具有固定分频比的分频器用于产生用于接收机的局部振荡信号，而具有可切换分频比的分频器用于产生用于发射机的本地振荡信号。 另外，用于基带信号的可变增益放大器设置有DC偏移电压检测器和DC偏移消除电路，用于支持高速数据通信以通过消除用于偏移的反馈回路内的滤波器的干涉来实现DC偏移的快速消除 消除。
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公开(公告)号：US20080182538A1
公开(公告)日：2008-07-31
申请号：US12056576
申请日：2008-03-27
申请人： Satoshi TANAKA , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
发明人： Satoshi TANAKA , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
CPC分类号： H04B1/30 , H03D2200/0047 , H03K21/16
摘要： A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.
摘要翻译： 适合较大规模集成的收发器采用直接转换接收，以减少滤波器的数量。 此外，通过利用分频器来为RF频带提供具有本地振荡信号的接收机和发射机来减少VCO的数量。 每个具有固定分频比的分频器用于产生用于接收机的局部振荡信号，而具有可切换分频比的分频器用于产生用于发射机的本地振荡信号。 另外，用于基带信号的可变增益放大器设置有DC偏移电压检测器和DC偏移消除电路，用于支持高速数据通信以通过消除用于偏移的反馈回路内的滤波器的干涉来实现DC偏移的快速消除 消除。
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公开(公告)号：US20080030911A1
公开(公告)日：2008-02-07
申请号：US11898946
申请日：2007-09-18
申请人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
发明人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
IPC分类号： H01C7/12
CPC分类号： H01L27/0259 , H01L27/0255 , H03F1/52 , H03F2200/372
摘要： Into an internal circuit to operate in a high-frequency band, there is incorporated a protective circuit of a multistage connection which is constructed to include a plurality of diode-connected transistors having a low parasitic capacity and free from a malfunction even when an input signal higher than the power supply voltage is applied. Into an internal circuit to operate in a low-frequency band, there is incorporated a protective circuit which is constructed to include one diode-connected transistor. The protective circuits include two lines of protective circuit, in which the directions of electric currents are so reversed as to protect the internal circuits against positive/negative static electricities.
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公开(公告)号：US20110092175A1
公开(公告)日：2011-04-21
申请号：US12975488
申请日：2010-12-22
申请人： Satoshi Tanaka , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
发明人： Satoshi Tanaka , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
CPC分类号： H04B1/30 , H03D2200/0047 , H03K21/16
摘要： A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.
摘要翻译： 适合较大规模集成的收发器采用直接转换接收，以减少滤波器的数量。 此外，通过利用分频器来为RF频带提供具有本地振荡信号的接收机和发射机来减少VCO的数量。 每个具有固定分频比的分频器用于产生用于接收机的局部振荡信号，而具有可切换分频比的分频器用于产生用于发射机的本地振荡信号。 另外，用于基带信号的可变增益放大器设置有DC偏移电压检测器和DC偏移消除电路，用于支持高速数据通信以通过消除用于偏移的反馈回路内的滤波器的干涉来实现DC偏移的快速消除 消除。
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公开(公告)号：US07414821B2
公开(公告)日：2008-08-19
申请号：US11898946
申请日：2007-09-18
申请人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
发明人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
IPC分类号： H02H9/00
CPC分类号： H01L27/0259 , H01L27/0255 , H03F1/52 , H03F2200/372
摘要： Into an internal circuit to operate in a high-frequency band, there is incorporated a protective circuit of a multistage connection which is constructed to include a plurality of diode-connected transistors having a low parasitic capacity and free from a malfunction even when an input signal higher than the power supply voltage is applied. Into an internal circuit to operate in a low-frequency band, there is incorporated a protective circuit which is constructed to include one diode-connected transistor. The protective circuits include two lines of protective circuit, in which the directions of electric currents are so reversed as to protect the internal circuits against positive/negative static electricities.
摘要翻译： 在内部电路中工作在高频带内，结合有多级连接的保护电路，其被构造为包括具有低寄生电容并且没有故障的多个二极管连接的晶体管，即使当输入信号 高于施加电源电压。 在内部电路中工作在低频带，其中包括一个保护电路，其构造为包括一个二极管连接的晶体管。 保护电路包括两条保护电路，其中电流方向相反，以保护内部电路免受正/负静电。
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公开(公告)号：US07298600B2
公开(公告)日：2007-11-20
申请号：US11104541
申请日：2005-04-13
申请人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
发明人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
IPC分类号： H01C7/12
CPC分类号： H01L27/0259 , H01L27/0255 , H03F1/52 , H03F2200/372
摘要： Into an internal circuit to operate in a high-frequency band, there is incorporated a protective circuit of a multistage connection which is constructed to include a plurality of diode-connected transistors having a low parasitic capacity and free from a malfunction even when an input signal higher than the power supply voltage is applied. Into an internal circuit to operate in a low-frequency band, there is incorporated a protective circuit which is constructed to include one diode-connected transistor. The protective circuits include two lines of protective circuit, in which the directions of electric currents are so reversed as to protect the internal circuits against positive/negative static electricities.
摘要翻译： 在内部电路中工作在高频带内，结合有多级连接的保护电路，其被构造为包括具有低寄生电容并且没有故障的多个二极管连接的晶体管，即使当输入信号 高于施加电源电压。 在内部电路中工作在低频带，其中包括一个保护电路，其构造为包括一个二极管连接的晶体管。 保护电路包括两条保护电路，其中电流方向相反，以保护内部电路免受正/负静电。
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公开(公告)号：US20050185355A1
公开(公告)日：2005-08-25
申请号：US11104541
申请日：2005-04-13
申请人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
发明人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
IPC分类号： H01L27/04 , H01L21/822 , H01L27/02 , H03F1/52 , H04B1/3822 , H04B1/40 , H02H1/00
CPC分类号： H01L27/0259 , H01L27/0255 , H03F1/52 , H03F2200/372
摘要： Into an internal circuit to operate in a high-frequency band, there is incorporated a protective circuit of a multistage connection which is constructed to include a plurality of diode-connected transistors having a low parasitic capacity and free from a malfunction even when an input signal higher than the power supply voltage is applied. Into an internal circuit to operate in a low-frequency band, there is incorporated a protective circuit which is constructed to include one diode-connected transistor. The protective circuits include two lines of protective circuit, in which the directions of electric currents are so reversed as to protect the internal circuits against positive/negative static electricities.
摘要翻译： 在内部电路中工作在高频带内，结合有多级连接的保护电路，其被构造为包括具有低寄生电容并且没有故障的多个二极管连接的晶体管，即使当输入信号 高于施加电源电压。 在内部电路中工作在低频带，其中包括一个保护电路，其构造为包括一个二极管连接的晶体管。 保护电路包括两条保护电路，其中电流方向相反，以保护内部电路免受正/负静电。
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公开(公告)号：US07885626B2
公开(公告)日：2011-02-08
申请号：US12056576
申请日：2008-03-27
申请人： Satoshi Tanaka , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
发明人： Satoshi Tanaka , Kazuo Watanabe , Masao Hotta , Toyohiko Hongo , Taizo Yamawaki , Masumi Kasahara , Kumiko Takikawa
CPC分类号： H04B1/30 , H03D2200/0047 , H03K21/16
摘要： A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF band. Dividers each having a fixed division ratio are used for generating locally oscillated signals for the receiver, while a divider having a switchable division ratio are used for generating the locally oscillated signal for the transmitter. In addition, a variable gain amplifier for baseband signal is provided with a DC offset voltage detector and a DC offset canceling circuit for supporting high speed data communications to accomplish fast cancellation of a DC offset by eliminating intervention of a filter within a feedback loop for offset cancellation.
摘要翻译： 适合较大规模集成的收发器采用直接转换接收，以减少滤波器的数量。 此外，通过利用分频器来为RF频带提供具有本地振荡信号的接收机和发射机来减少VCO的数量。 每个具有固定分频比的分频器用于产生用于接收机的局部振荡信号，而具有可切换分频比的分频器用于产生用于发射机的本地振荡信号。 另外，用于基带信号的可变增益放大器设置有DC偏移电压检测器和DC偏移消除电路，用于支持高速数据通信以通过消除用于偏移的反馈回路内的滤波器的干涉来实现DC偏移的快速消除 消除。
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公开(公告)号：US07035069B2
公开(公告)日：2006-04-25
申请号：US10664968
申请日：2003-09-22
申请人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
发明人： Kumiko Takikawa , Satoshi Tanaka , Masumi Kasahara
IPC分类号： H01C7/12
CPC分类号： H01L27/0259 , H01L27/0255 , H03F1/52 , H03F2200/372
摘要： Into an internal circuit to operate in a high-frequency band, there is incorporated a protective circuit of a multistage connection which is constructed to include a plurality of diode-connected transistors having a low parasitic capacity and free from a malfunction even when an input signal higher than the power supply voltage is applied. Into an internal circuit to operate in a low-frequency band, there is incorporated a protective circuit which is constructed to include one diode-connected transistor. The protective circuits include two lines of protective circuit, in which the directions of electric currents are so reversed as to protect the internal circuits against positive/negative static electricities.
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