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1. 发明申请

US20070142012A1 Wireless communication receiver 审中-公开
标题翻译：无线通信接收机
公开(公告)号：US20070142012A1
公开(公告)日：2007-06-21
申请号：US11702493
申请日：2007-02-06
申请人： Yukinori Akamine , Hisayoshi Kajiwara , Satoshi Tanaka , Takashi Yano , Hirotake Ishii , Akio Yamamoto , Kazuaki Hori , Kazuhiko Hikasa
发明人： Yukinori Akamine , Hisayoshi Kajiwara , Satoshi Tanaka , Takashi Yano , Hirotake Ishii , Akio Yamamoto , Kazuaki Hori , Kazuhiko Hikasa
IPC分类号： H04B1/06 , H04B7/00
CPC分类号： H03G3/3078 , H03G3/3052 , H04B1/707
摘要： A wireless communication receiver that is able to lessen the effect of noise that accompanies gain change by programmable gain amplifiers. The receiver includes an AGC controller which controls the timing at which the programmable gain amplifiers make gain change, using a terminal counter and a sequencer. The receiver prevents gain change noise signals during the reception of control signals and other signals that are susceptible to noise. By the timing control feature, the programmable gain amplifiers make gain change while reducing noise impact.
摘要翻译：一种无线通信接收机，能够通过可编程增益放大器减轻伴随增益变化的噪声影响。接收机包括AGC控制器，其使用终端计数器和定序器来控制可编程增益放大器使增益改变的定时。接收器在接收到易受噪声的控制信号和其它信号期间防止增益变化噪声信号。通过定时控制功能，可编程增益放大器可实现增益改变，同时降低噪声影响。

2. 发明授权

US07194244B2 Wireless communication receiver 失效
公开(公告)号：US07194244B2
公开(公告)日：2007-03-20
申请号：US10253648
申请日：2002-09-25
申请人： Yukinori Akamine , Hisayoshi Kajiwara , Satoshi Tanaka , Takashi Yano , Hirotake Ishii , Akio Yamamoto , Kazuaki Hori , Kazuhiko Hikasa
发明人： Yukinori Akamine , Hisayoshi Kajiwara , Satoshi Tanaka , Takashi Yano , Hirotake Ishii , Akio Yamamoto , Kazuaki Hori , Kazuhiko Hikasa
IPC分类号： H04B1/06
CPC分类号： H03G3/3078 , H03G3/3052 , H04B1/707
摘要： A wireless communication receiver that is able to lessen the effect of noise that accompanies gain change by programmable gain amplifiers. The receiver includes an AGC controller which controls the timing at which the programmable gain amplifiers make gain change, using a terminal counter and a sequencer. The receiver prevents gain change noise signals during the reception of control signals and other signals that are susceptible to noise. By the timing control feature, the programmable gain amplifiers make gain change while reducing noise impact.

3. 发明申请

US20100056201A1 SEMICONDUCTOR INTEGRATED CIRCUIT AND CIRCUIT OPERATION METHOD 审中-公开
标题翻译：半导体集成电路和电路操作方法
公开(公告)号：US20100056201A1
公开(公告)日：2010-03-04
申请号：US12543504
申请日：2009-08-19
申请人： Yukinori AKAMINE , Kazuhiko Hikasa , Yuki Okada , Satoru Yamamoto
发明人： Yukinori AKAMINE , Kazuhiko Hikasa , Yuki Okada , Satoru Yamamoto
IPC分类号： H04M1/00 , H04B1/38
CPC分类号： H04B1/0017
摘要： There is a need for reducing a chip footprint of a multimode-compatible semiconductor integrated circuit. A reception-based analog front-end unit converts a first RF reception signal according to a first communication system and a second RF reception signal according to a second communication system into a first reception-based analog base band signal having a large signal band and a second reception-based analog base band signal having a small signal band, respectively. An oversampling analog-to-digital converter generates first and second reception-based digital base band signals. A first digital filter is used for a decimation process on the first and second reception-based digital base band signals in common with each other. Second digital filters perform a down-sampling process to generate the first reception-based digital base band signal having the large first sampling rate. Third digital filters perform a down-sampling process to generate the second reception-based digital base band signal having the small second sampling rate.
摘要翻译：需要减少多模兼容半导体集成电路的芯片占用空间。基于接收的模拟前端单元将根据第一通信系统的第一RF接收信号和根据第二通信系统的第二RF接收信号转换为具有大的信号频带的第一基于接收的模拟基带信号和分别具有小信号频带的第二基于接收的模拟基带信号。过采样模数转换器产生第一和第二基于接收的数字基带信号。第一数字滤波器用于相互共同的基于第一和第二接收的数字基带信号的抽取处理。第二数字滤波器执行下采样处理以产生具有大的第一采样率的第一基于接收的数字基带信号。第三数字滤波器执行下采样处理以产生具有小的第二采样率的第二基于接收的数字基带信号。

4. 发明申请

US20050233714A1 Variable gain amplifier for use in communications 审中-公开
公开(公告)号：US20050233714A1
公开(公告)日：2005-10-20
申请号：US11149546
申请日：2005-06-10
申请人： Hisayoshi Kajiwara , Kenji Toyota , Kazuhiko Hikasa , Taizo Yamawaki
发明人： Hisayoshi Kajiwara , Kenji Toyota , Kazuhiko Hikasa , Taizo Yamawaki
IPC分类号： H03G1/00 , H03G3/30 , H04B1/04 , H01Q11/12 , H03F3/45
CPC分类号： H03G3/3042 , H03G1/0052
摘要： A variable gain amplifier of low amplitude distortion, and low noise, having a large variable range, is provided. A variable gain differential amplifier that controls a gain by use of bias current is used as each of unit amplifiers (VGAs) making up the variable gain amplifier. A large variable gain range is obtained by series-connecting a plurality of the variable gain differential amplifiers. An attenuator is installed on the input side of the unit amplifier (VGA) at least in the initial stage. By doing so, it becomes possible to prevent amplitude distortion from occurring to the respective VGAs. An attenuator utilizing voltage division by capacitors, generating no noise, is used for lowering noise. Further, the variable gain amplifier is provided with a fixed gain amplifier installed in the final stage as necessary in order to obtain a total gain as desired. With the use of the variable gain amplifier as a variable gain amplifier for output power control of a polar loop transmitter, an excellent function for output power control can be achieved without causing significant deterioration in distortion characteristic and noise characteristic thereof.

5. 发明授权

US06930549B2 Variable gain amplifier for use in communications 失效
标题翻译：用于通信的可变增益放大器
公开(公告)号：US06930549B2
公开(公告)日：2005-08-16
申请号：US10446859
申请日：2003-05-29
申请人： Hisayoshi Kajiwara , Kenji Toyota , Kazuhiko Hikasa , Taizo Yamawaki
发明人： Hisayoshi Kajiwara , Kenji Toyota , Kazuhiko Hikasa , Taizo Yamawaki
IPC分类号： H03G1/00 , H03G3/30 , H04B1/04 , H03F3/45
CPC分类号： H03G3/3042 , H03G1/0052
摘要： A variable gain amplifier of low amplitude distortion, and low noise, having a large variable range, is provided. A variable gain differential amplifier that controls a gain by use of bias current is used as each of unit amplifiers (VGAs) making up the variable gain amplifier. A large variable gain range is obtained by series-connecting a plurality of the variable gain differential amplifiers. An attenuator is installed on the input side of the unit amplifier (VGA) at least in the initial stage. By doing so, it becomes possible to prevent amplitude distortion from occurring to the respective VGAs. An attenuator utilizing voltage division by capacitors, generating no noise, is used for lowering noise. Further, the variable gain amplifier is provided with a fixed gain amplifier installed in the final stage as necessary in order to obtain a total gain as desired. With the use of the variable gain amplifier as a variable gain amplifier for output power control of a polar loop transmitter, an excellent function for output power control can be achieved without causing significant deterioration in distortion characteristic and noise characteristic thereof.
摘要翻译：提供了具有较大可变范围的低振幅失真和低噪声的可变增益放大器。使用通过使用偏置电流来控制增益的可变增益差分放大器被用作构成可变增益放大器的单位放大器（VGA）中的每一个。通过串联连接多个可变增益差分放大器来获得大的可变增益范围。至少在初始阶段，衰减器安装在单元放大器（VGA）的输入侧。通过这样做，可以防止对各个VGA产生振幅失真。使用由电容器分压而不产生噪声的衰减器用于降低噪声。此外，可变增益放大器设置有必要时安装在最后级的固定增益放大器，以便根据需要获得总增益。通过使用可变增益放大器作为用于极性环路发送器的输出功率控制的可变增益放大器，可以实现输出功率控制的优异功能，而不会引起失真特性和噪声特性的显着劣化。

6. 发明授权

US07463091B2 Communication semiconductor integrated circuit device and wireless communication system 失效
公开(公告)号：US07463091B2
公开(公告)日：2008-12-09
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： H03G3/20
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.

7. 发明授权

US06750719B2 Communication semiconductor integrated circuit device and wireless communication system 失效
标题翻译：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。

8. 发明申请

US20060293004A1 Semiconductor integrated circuit device and wireless communication system 审中-公开
标题翻译：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。

9. 发明申请

US20070093225A1 Semiconductor integrated circuit device and wireless communication system 审中-公开
公开(公告)号：US20070093225A1
公开(公告)日：2007-04-26
申请号：US11638417
申请日：2006-12-14
申请人： Motoki Murakami , Kazuaki Hori , Kazuhiko Hikasa
发明人： Motoki Murakami , Kazuaki Hori , Kazuhiko Hikasa
IPC分类号： H04B1/06 , H04B7/00
CPC分类号： H03G3/3078 , H03G1/0088 , H03G3/3052 , H04B1/28 , H04B1/406
摘要： As the gain control amplifiers for amplifying the reception signal, the step amplifiers are used. Two sets of these step amplifiers are provided and are then controlled to be used alternately. When switching of the gain occurs, after the gain is switched with the step amplifier not operated and offset is cancelled, the amplifier to which the reception signal is inputted is switched. Accordingly, the step amplifier can be used as the gain control amplifier for amplifying the reception signal to provide almost constant power consumption even when the gain is changed depending on the intensity of reception signal in the semiconductor integrated circuit device for communication to form a wireless communication system of dual-mode or more modes including the W-CDMA system. As a result, the operation life of battery, namely, the reception waiting period and communication period by single charging process can be expanded.

10. 发明授权

US07116949B2 Semiconductor integrated circuit device and wireless communication system 失效
公开(公告)号：US07116949B2
公开(公告)日：2006-10-03
申请号：US10685481
申请日：2003-10-16
申请人： Kiyoshi Irie , Kazuaki Hori , Kazuhiko Hikasa
发明人： Kiyoshi Irie , Kazuaki Hori , Kazuhiko Hikasa
IPC分类号： H01Q11/12 , H03F3/45 , H04L25/49 , H04B1/38
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.

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