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42 条记录 (耗时 0.036 秒)

    Direct conversion receiver
    3.
    发明授权
    Direct conversion receiver 有权
    直接转换接收机

    公开(公告)号：US07260373B2

    公开(公告)日：2007-08-21

    申请号：US10727612

    申请日：2003-12-05

    申请人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    发明人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    IPC分类号： H04B1/10

    CPC分类号： H04B1/30 ,  H03G3/3052

    摘要： In a direct conversion receiver, to cancel a DC offset generated in the baseband processing block, negative feedback arrangements comprising a gain control amplifier and a low-pass filter are respectively attached to the I and Q signal branches of the baseband block following mixer outputs. The gain control amplifier in each negative feedback circuit is gain adjusted so that the product G-B of the gain G of a primary gain control amplifier and its own gain B will be constant and thereby the DC offset is cancelled. This DC offset cancellation can be applied in a continuous receiving system with no intermittent time during a receiving operation. Capacitance elements located off-chip can be reduced to those to be used only in the low-pass filters in the negative feedback circuits, whereas many off-chip capacitance elements have been required to be inserted between each stage of gain control amplifiers in conventional baseband chains.

    摘要翻译： 在直接转换接收机中，为了消除在基带处理块中产生的DC偏移，包括增益控制放大器和低通滤波器的负反馈装置分别附加到混频器输出之后的基带块的I和Q信号分支。 每个负反馈电路中的增益控制放大器被增益调整，使得主增益控制放大器的增益G的乘积G-B和其自身的增益B将恒定，从而DC偏移被消除。 该DC偏移消除可以应用于在接收操作期间没有间歇时间的连续接收系统中。 位于片外的电容元件可以减少到仅在负反馈电路中的低通滤波器中使用的电容元件，而许多芯片外电容元件需要插入到常规基带中的增益控制放大器的每个级之间 链条

    Direct conversion receiver
    4.
    发明申请
    Direct conversion receiver 有权
    直接转换接收机

    公开(公告)号：US20070190960A1

    公开(公告)日：2007-08-16

    申请号：US11725475

    申请日：2007-03-20

    申请人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    发明人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    IPC分类号： H04B1/26

    CPC分类号： H04B1/30 ,  H03G3/3052

    摘要： In a direct conversion receiver, to cancel a DC offset generated in the baseband processing block, negative feedback arrangements comprising a gain control amplifier and a low-pass filter are respectively attached to the I and Q signal branches of the baseband block following mixer outputs. The gain control amplifier in each negative feedback circuit is gain adjusted so that the product G·B of the gain G of a primary gain control amplifier and its own gain B will be constant and thereby the DC offset is cancelled. This DC offset cancellation can be applied in a continuous receiving system with no intermittent time during a receiving operation. Capacitance elements located off-chip can be reduced to those to be used only in the low-pass filters in the negative feedback circuits, whereas many off-chip capacitance elements have been required to be inserted between each stage of gain control amplifiers in conventional baseband chains.

    摘要翻译： 在直接转换接收机中，为了消除在基带处理块中产生的DC偏移，包括增益控制放大器和低通滤波器的负反馈装置分别附加到混频器输出之后的基带块的I和Q信号分支。 每个负反馈电路中的增益控制放大器被增益调整，使得主增益控制放大器的增益G的乘积G.B和其自身的增益B将恒定，从而DC偏移被消除。 该DC偏移消除可以应用于在接收操作期间没有间歇时间的连续接收系统中。 位于片外的电容元件可以减少到仅在负反馈电路中的低通滤波器中使用的电容元件，而许多芯片外电容元件需要插入到常规基带中的增益控制放大器的每个级之间 链条

    Direct conversion receiver
    5.
    发明授权
    Direct conversion receiver 有权
    直接转换接收机

    公开(公告)号：US07856218B2

    公开(公告)日：2010-12-21

    申请号：US11725475

    申请日：2007-03-20

    申请人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    发明人： Yukinori Akamine ,  Satoshi Tanaka ,  Akio Yamamoto ,  Kazuaki Hori

    IPC分类号： H04B1/10

    CPC分类号： H04B1/30 ,  H03G3/3052

    摘要： In a direct conversion receiver, to cancel a DC offset generated in the baseband processing block, negative feedback arrangements comprising a gain control amplifier and a low-pass filter are respectively attached to the I and Q signal branches of the baseband block following mixer outputs. The gain control amplifier in each negative feedback circuit is gain adjusted so that the product G·B of the gain G of a primary gain control amplifier and its own gain B will be constant and thereby the DC offset is cancelled. This DC offset cancellation can be applied in a continuous receiving system with no intermittent time during a receiving operation. Capacitance elements located off-chip can be reduced to those to be used only in the low-pass filters in the negative feedback circuits, whereas many off-chip capacitance elements have been required to be inserted between each stage of gain control amplifiers in conventional baseband chains.

    摘要翻译： 在直接转换接收机中，为了消除在基带处理块中产生的DC偏移，包括增益控制放大器和低通滤波器的负反馈装置分别附加到混频器输出之后的基带块的I和Q信号分支。 每个负反馈电路中的增益控制放大器被增益调整，使得主增益控制放大器的增益G的乘积G·B和其自身的增益B将恒定，从而DC偏移被消除。 该DC偏移消除可以应用于在接收操作期间没有间歇时间的连续接收系统中。 位于片外的电容元件可以减少到仅在负反馈电路中的低通滤波器中使用的电容元件，而许多芯片外电容元件需要插入到常规基带中的增益控制放大器的每个级之间 链条

    Semiconductor integrated circuit device and wireless communication system
    7.
    发明申请
    Semiconductor integrated circuit device and wireless communication system 审中-公开
    半导体集成电路器件和无线通信系统

    公开(公告)号：US20060293004A1

    公开(公告)日：2006-12-28

    申请号：US11510764

    申请日：2006-08-28

    申请人： Kiyoshi Irie ,  Kazuaki Hori ,  Kazuhiko Hikasa

    发明人： Kiyoshi Irie ,  Kazuaki Hori ,  Kazuhiko Hikasa

    IPC分类号： H01Q11/12 ,  H04B1/06 ,  H04B1/04

    CPC分类号： H03G1/0088 ,  H03F3/45098 ,  H03F2200/294 ,  H03F2203/45496 ,  H03F2203/45504 ,  H03F2203/45722 ,  H03G1/0023 ,  H04B1/707 ,  H04B2201/70706

    摘要： The dynamic range is changed by switching a current applied to an amplifying circuit to obtain the minimum ICP required to keep linearity with the number of multiplexes even when the number of multiplexes of data is changed by switching the operation current of the amplifying circuits of the transmission system and also supplying the information about number of multiplexes of data to be transmitted to the amplifying circuits of the transmission system from the baseband circuit. Thereby, the signal can be transmitted without distortion even when the number of multiplexes increases and the current of the amplifying circuit may be reduced when the number of multiplexes is small in order to reduce the current consumption in the communication semiconductor integrated circuit device which can form a wireless communication system of the code division multiplex system such as W-CDMA system.

    摘要翻译： 通过切换施加到放大电路的电流来改变动态范围，以便即使当通过切换传输的放大电路的操作电流来改变数据的多路复用数量时，获得与多路复用数保持线性关系所需的最小ICP 并且还从基带电路向发送系统的放大电路提供关于要发送的数据的复用数量的信息。 因此，即使多路复用数量增加，信号也可以无失真地发送，并且当多路复用数量少时可以减小放大电路的电流，以便减少可形成的通信半导体集成电路器件中的电流消耗 诸如W-CDMA系统的码分多路复用系统的无线通信系统。

    Communication semiconductor integrated circuit device and wireless communication system
    8.
    发明申请
    Communication semiconductor integrated circuit device and wireless communication system 失效
    通信半导体集成电路器件和无线通信系统

    公开(公告)号：US20080024227A1

    公开(公告)日：2008-01-31

    申请号：US11902968

    申请日：2007-09-27

    申请人： Kenji Toyota ,  Kazuaki Hori ,  Kazuhiko Hikasa

    发明人： Kenji Toyota ,  Kazuaki Hori ,  Kazuhiko Hikasa

    IPC分类号： H03G3/10

    CPC分类号： H03F1/0261 ,  H03F3/245 ,  H03F3/45085 ,  H03G1/00 ,  H03G1/0023 ,  H03G3/3042 ,  H03G2201/40

    摘要： The present invention provides a communication semiconductor integrated circuit device equipped with a high-frequency power amplifier circuit including a gain control amplifier and a bias circuit which supplies such a bias current as to linearly change the gain of the gain control amplifier, and a wireless communication system using the same. A bias current generating circuit which supplies a bias current to a linear amplifier that constitutes the communication high-frequency power amplifier circuit, comprises a plurality of variable current sources respectively different in current value and start level. These variable current sources are controlled according to an input control voltage and thereby combine their currents into a bias current. The combined bias current changes exponentially with respect to the input control voltage.

    摘要翻译： 本发明提供了一种配备有包括增益控制放大器和偏置电路的高频功率放大器电路的通信半导体集成电路装置，该偏置电路提供这样的偏置电流以线性地改变增益控制放大器的增益，以及无线通信 系统使用相同。 向构成通信高频功率放大器电路的线性放大器提供偏置电流的偏置电流产生电路包括分别与电流值和起始电平不同的多个可变电流源。 这些可变电流源根据输入控制电压进行控制，从而将它们的电流组合成偏置电流。 组合的偏置电流相对于输入控制电压呈指数变化。

    Communication semiconductor integrated circuit device and wireless communication system
    10.
    发明授权
    Communication semiconductor integrated circuit device and wireless communication system 失效
    通信半导体集成电路器件和无线通信系统

    公开(公告)号：US06750719B2

    公开(公告)日：2004-06-15

    申请号：US10323819

    申请日：2002-12-20

    申请人： Kenji Toyota ,  Kazuaki Hori ,  Kazuhiko Hikasa

    发明人： Kenji Toyota ,  Kazuaki Hori ,  Kazuhiko Hikasa

    IPC分类号： H03G310

    CPC分类号： H03F1/0261 ,  H03F3/245 ,  H03F3/45085 ,  H03G1/00 ,  H03G1/0023 ,  H03G3/3042 ,  H03G2201/40

    摘要： The present invention provides a communication semiconductor integrated circuit device equipped with a high-frequency power amplifier circuit including a gain control amplifier and a bias circuit which supplies such a bias current as to linearly change the gain of the gain control amplifier, and a wireless communication system using the same. A bias current generating circuit which supplies a bias current to a linear amplifier that constitutes the communication high-frequency power amplifier circuit, comprises a plurality of variable current sources respectively different in current value and start level. These variable current sources are controlled according to an input control voltage and thereby combine their currents into a bias current. The combined bias current changes exponentially with respect to the input control voltage.

    摘要翻译： 本发明提供了一种配备有包括增益控制放大器和偏置电路的高频功率放大器电路的通信半导体集成电路装置，该偏置电路提供这样的偏置电流以线性地改变增益控制放大器的增益，以及无线通信 系统使用相同。 向构成通信高频功率放大器电路的线性放大器提供偏置电流的偏置电流产生电路包括分别与电流值和起始电平不同的多个可变电流源。 这些可变电流源根据输入控制电压进行控制，从而将它们的电流组合成偏置电流。 组合的偏置电流相对于输入控制电压呈指数变化。