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1. 发明专利

JP2004297454A Wireless communication system, and semiconductor integrated circuit for communication 有权
公开(公告)号：JP2004297454A
公开(公告)日：2004-10-21
申请号：JP2003087238
申请日：2003-03-27
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： TAKANO RYOICHI , HIKASA KAZUHIKO , TOYODA KENJI , OKADA KAZUHISA
IPC分类号： H03F3/45 , H03B5/12 , H03G3/30 , H03J7/02 , H04B1/04
CPC分类号： H03J7/02 , H03G3/3047 , H04B1/0483 , H04B2001/0416
摘要： PROBLEM TO BE SOLVED: To prevent the deterioration of precision in the output power control of a power amplifier due to noise which comes from the output pin of a transmission oscillator into the input pin of a signal for detecting the output level of the power amplifier (feedback signal), when the transmission oscillator is incorporated in a semiconductor integrated circuit for communication being a high frequency IC, etc, for constituting a radio communication system.
SOLUTION: The transmission oscillator (TxVCO) is incorporated in the high frequency IC (100). The signal for detecting the output level of the power amplifier (210) which is detected by a coupler (220) is attenuated to a level a little higher than the level of the noise to come from the output pin of the transmission oscillator into the input pin of the feedback signal of an amplitude control loop, and is inputted to the input pin of the feedback signal of the high frequency IC.
COPYRIGHT: (C)2005,JPO&NCIPI

2. 发明专利

JP2010056978A Semiconductor integrated circuit and method of operating the same 审中-公开
标题翻译：半导体集成电路及其工作方法
公开(公告)号：JP2010056978A
公开(公告)日：2010-03-11
申请号：JP2008220651
申请日：2008-08-29
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： AKAMINE YUKINORI , HIKASA KAZUHIKO , OKADA HIROKI , YAMAMOTO SATORU
IPC分类号： H04B1/40 , H03H17/00 , H03H17/02 , H04B1/30 , H04B1/3822
CPC分类号： H04B1/0017
摘要： PROBLEM TO BE SOLVED: To reduce a chip footprint of a semiconductor integrated circuit adaptable to a multi-mode. SOLUTION: A reception analog front end unit 10 converts first and second RF reception signals in first and second communication schemes into first and second reception analog baseband signals having large and small signal bands. An oversampling type A/D converter 102 generates first and second reception digital baseband signals and a first digital filter 103 is used in common for decimation processing of the first and second reception digital baseband signals. Second digital filters 205, 206, 207 produce the first reception digital baseband signal having a large first sampling rate through downsampling processing and third digital filters 210, 211, 212 produce the second reception digital baseband signal having a small second sampling rate through downsampling processing. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：减少适用于多模式的半导体集成电路的芯片占地面积。解决方案：接收模拟前端单元10将第一和第二通信方案中的第一和第二RF接收信号转换为具有大信号频带和小信号频带的第一和第二接收模拟基带信号。过采样型A / D转换器102生成第一和第二接收数字基带信号，并且第一数字滤波器103被共同地用于第一和第二接收数字基带信号的抽取处理。第二数字滤波器205,206,207通过下采样处理产生具有大的第一采样率的第一接收数字基带信号，并且第三数字滤波器210,211,212通过下采样处理产生具有小的第二采样率的第二接收数字基带信号。版权所有（C）2010，JPO＆INPIT

3. 发明专利

JP2009212869A Transmitter 有权
标题翻译：发射机
公开(公告)号：JP2009212869A
公开(公告)日：2009-09-17
申请号：JP2008054217
申请日：2008-03-05
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： TOYODA KENJI , HIKASA KAZUHIKO
IPC分类号： H04L27/36 , H04B1/04 , H04L27/20
CPC分类号： H04B1/0475 , H03D7/1433 , H03D7/145 , H03D7/1458 , H03D2200/0043 , H03D2200/009 , H04B2001/0491 , H04L27/0014 , H04L27/34 , H04L27/362 , H04L2027/0018
摘要： PROBLEM TO BE SOLVED: To reduce chip occupied area of a direct upconversion (DUC) architecture transmitter and to reduce carrier leakage by a local signal to be supplied to a transmission modulator. SOLUTION: This transmitter is equipped with the transmission modulator 10 including a first modulator 1 and a second modulator 2, a phase comparator 11, and a controller 13. A first non-inverting local signal LoI and a second non-inverting local signal LoQ to be supplied to the modulators 1, 2 are set so as to have predetermined phase difference. In a calibration operation of carrier leakage reduction, a first local signal LoI, /LoI or a second local signal LoQ, /LoQ and a carrier signal to be leaked to output of the transmission modulator 10 are supplied to the phase comparator 11. Until the phase comparator 11 detects predetermined phase difference, the controller 13 changes ratio of bias current of each pair transistors M11, M21:M12, M22 of each of the modulators 1, 2. When the predetermined phase difference is detected, change of the ratio of DC bias current is stopped. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：减少直接上变频（DUC）架构发射机的芯片占用面积，并减少要提供给传输调制器的本地信号的载波泄漏。解决方案：该发射器配备有包括第一调制器1和第二调制器2的传输调制器10，相位比较器11和控制器13.第一同相局部信号Lo1和第二非反相局部信号被提供给调制器1,2的信号LoQ被设置为具有预定的相位差。在载波泄漏减少的校准操作中，要泄漏到传输调制器10的输出的第一本地信号LoI，/ LoI或第二本地信号LoQ，/ LoQ和载波信号被提供给相位比较器11.直到相位比较器11检测预定的相位差，控制器13改变每个调制器1,2的每对晶体管M11，M21，M12，M22的偏置电流的比率。当检测到预定的相位差时，DC的比率的变化偏置电流停止。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2009206882A Semiconductor integrated circuit, and operation method thereof 有权
标题翻译：半导体集成电路及其操作方法
公开(公告)号：JP2009206882A
公开(公告)日：2009-09-10
申请号：JP2008047662
申请日：2008-02-28
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： HIKASA KAZUHIKO , TAKANO RYOICHI , YAMAMOTO SATORU , TAKAHASHI TAMOTSU , AKAMINE YUKINORI
IPC分类号： H04B1/30 , H04W88/06
摘要： PROBLEM TO BE SOLVED: To reduce chip area and to compensate DC offset voltage of intermittent receiving operations and continuous receiving operations. SOLUTION: An RFIC is equipped with a first low noise amplifier which receives intermittent reception signals; a first reception block 100 including a first reception mixer; a second low noise amplifier which receives continuous RF reception signals; and a second reception block 200 including a second reception mixer. The RFIC is further equipped with: prestage and poststage variable amplifiers 112, 115; an LPF 113; a DC offset cancellation circuit 118, an A/D converter 116; and a digital filter 130. In a period of warm up before transition from a non-reception slot and an idle state in intermittent reception to continuous receiving operations, DC offset voltage of the prestage variable amplifier by the DC offset cancellation circuit is reduced. During the continuous receiving operations, DC offset voltage of the poststage variable amplifier is reduced by feedback control from the digital filter to the poststage variable amplifier. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：减少芯片面积并补偿间歇接收操作和连续接收操作的直流偏移电压。解决方案：RFIC配备有接收间歇接收信号的第一低噪声放大器; 包括第一接收混合器的第一接收块100; 接收连续RF接收信号的第二低噪声放大器; 以及包括第二接收混合器的第二接收块200。 RFIC还配备有：前级和后级可变放大器112,115; LPF 113; DC偏移消除电路118，A / D转换器116; 和数字滤波器130.在从非接收时隙和间歇接收中的空闲状态转变为连续接收操作之前的预热期间，由DC偏移消除电路减少了前置可变放大器的DC偏移电压。在连续接收操作期间，通过从数字滤波器到后级可变放大器的反馈控制，降低了后级可变放大器的DC偏移电压。版权所有（C）2009，JPO＆INPIT

5. 发明专利

JP2005072031A Semiconductor device for high frequency, electronic component for communication, and radio communication system 审中-公开
标题翻译：高频半导体器件，通信用电子元件和无线电通信系统
公开(公告)号：JP2005072031A
公开(公告)日：2005-03-17
申请号：JP2003208334
申请日：2003-08-22
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： YAHAGI KOICHI , HIKASA KAZUHIKO , TAKANO RYOICHI
IPC分类号： H01L21/60 , H03C5/00 , H03L7/00 , H04B1/04
CPC分类号： H01L24/02 , H01L2924/01004 , H01L2924/01005 , H01L2924/01006 , H01L2924/01013 , H01L2924/01033 , H01L2924/01082 , H01L2924/1305 , H01L2924/13091 , H01L2924/14 , H01L2924/15787 , H03C5/00 , H01L2924/00
摘要： PROBLEM TO BE SOLVED: To prevent inconveniences where the output power control precision of a power amplifier deteriorates by noise and crosstalk jumping into the input pin of the detection signal (feedback signal) of the output level of the power amplifier from the output pin of an oscillator for transmission, when a semiconductor integrated circuit for communication, such as a high-frequency IC for composing a radio communication system, incorporates an oscillator for transmission. SOLUTION: The high-frequency IC 100 incorporates the oscillator TxVCO for transmission in differential output, and an equivalent impedance is provided with the same impedance as that connected to a normal output terminal or a dummy external terminal P3 for outputting a transmission signal in an inverse phase. One of the differential output of the oscillator for transmission is inputted to the power amplifier via the normal output terminal, and the other of the differential output is connected to the equivalent impedance or the dummy external terminal. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了防止功率放大器的输出功率控制精度由噪声和串扰跳入输入引脚中的功率放大器的输出电平（反馈信号）的输出的不良情况从输出当用于通信的半导体集成电路（例如用于构成无线电通信系统的高频IC）包括用于传输的振荡器时，用于传输的振荡器的引脚。解决方案：高频IC 100包含用于差分输出传输的振荡器TxVCO，并且等效阻抗具有与连接到正常输出端子的连接器相同的阻抗或用于输出发送信号的虚拟外部端子P3 在一个反相。用于传输的振荡器的差分输出之一通过正常输出端子输入到功率放大器，另一个差分输出连接到等效阻抗或虚设外部端子。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2004159221A Semiconductor integrated circuit for communication, and radio communication system 审中-公开
标题翻译：用于通信的半导体集成电路和无线电通信系统
公开(公告)号：JP2004159221A
公开(公告)日：2004-06-03
申请号：JP2002324813
申请日：2002-11-08
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： IRIE KIYOSHI , HORI KAZUAKI , HIKASA KAZUHIKO
IPC分类号： H03G3/30 , H03F3/45 , H03G1/00 , H04B1/04 , H04J13/00 , H04J13/04
CPC分类号： H03G1/0088 , H03F3/45098 , H03F2200/294 , H03F2203/45496 , H03F2203/45504 , H03F2203/45722 , H03G1/0023 , H04B1/707 , H04B2201/70706
摘要： PROBLEM TO BE SOLVED: To transmit a signal without distortion even if the number of times of multiplexing is increased and to reduce the consumption current by reducing the current of an amplifier circuit when the number of multiplexing is small in a semiconductor integrated circuit for communication that constructs a radio communication system of a code multiplex system such as a W-CDMA (wideband code division multiple access). SOLUTION: The operating current of amplifier circuits (132 and 136) of a transmission system is made switchable, and the number-of-times-multiplexing information (MC) of data to be transmitted is supplied to the amplifier circuits of the transmission system from a base-band circuit (140), and a current to be allowed to flow through the amplifier circuits is switched so as to obtain the minimum ICP required to maintain linearity by the number of times of multiplexing at that time even if the number of times of multiplexing the data is changed, thereby changing a dynamic range. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：即使多路复用的次数增加，也可以发送无失真的信号，并且在半导体集成电路中的复用次数少的情况下，通过减小放大电路的电流来降低消耗电流用于构建诸如W-CDMA（宽带码分多址）的码多路复用系统的无线电通信系统的通信。解决方案：传输系统的放大器电路（132和136）的工作电流是可切换的，并且要传输的数据的次数复用信息（MC）被提供给切换来自基带电路（140）的传输系统，并且允许流过放大器电路的电流，以便获得在该时刻将线性度保持多次的所需的最小ICP，即使改变数据的多路复用次数，从而改变动态范围。版权所有（C）2004，JPO

7. 发明专利

JP2004120306A Variable gain amplifier 审中-公开
公开(公告)号：JP2004120306A
公开(公告)日：2004-04-15
申请号：JP2002280452
申请日：2002-09-26
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： KAJIWARA HISAYOSHI , TOYODA KENJI , HIKASA KAZUHIKO , YAMAWAKI DAIZO
IPC分类号： H03G1/00 , H03G3/30 , H04B1/04
CPC分类号： H03G3/3042 , H03G1/0052
摘要： PROBLEM TO BE SOLVED: To provide a variable gain amplifier with a large variable gain range, less distortion, and less noises.
SOLUTION: A gm variable differential amplifier 104 to execute the control of the gain by a bias current is used as a unit amplifier (VGA)102 constituting the variable gain amplifier 100. A large variable gain range can be obtained by connecting a plurality of stages of the gm variable differential amplifiers in series. Signals are attenuated by providing an attenuator 101 at least on the input side of the initial stage VGA1. By this, it prevents amplitude distortion from occurring in each VGA. A capacitance voltage dividing attenuator 101 which does not generate noises is used as an attenuator in order to reduce noises. A fixed gain amplifier 103 is provided at the final stage in order to obtain the desired whole gain if required in the variable gain amplifier 100. If the variable gain amplifier is used for the variable gain amplifier for controlling transmission output of a Polar loop transmitter, an excellent transmission output control function can be realized without causing large degradation of distortion characteristics and noise characteristics.
COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2004015409A Semiconductor integrated circuit for communication and wireless communication system 审中-公开
公开(公告)号：JP2004015409A
公开(公告)日：2004-01-15
申请号：JP2002165833
申请日：2002-06-06
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： MURAKAMI MOTOKI , HORI KAZUAKI , HIKASA KAZUHIKO
IPC分类号： H03F3/45 , H03F3/34 , H03F3/68 , H03G1/00 , H03G3/10 , H03G3/20 , H03G3/30 , H04B1/28 , H04B1/30 , H04B1/40
CPC分类号： H03G3/3078 , H03G1/0088 , H03G3/3052 , H04B1/28 , H04B1/406
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit for communication configuring a wireless communication system of a dual mode or over including the W-CDMA system wherein a step amplifier is employed for a gain control amplifier for amplifying a received signal, so as to make current consumption almost constant even when the gain is changed in response to the strength of the received signal, so as to extend the lifetime of a battery, that is, a standby time and a communicating time by one charging.
SOLUTION: The step amplifiers are employed for the gain control amplifiers (GCA, 241A, 241b, 243a, 243b) for amplifying the received signal, two pairs of the step amplifiers are provided and controlled for alternate use, on the occurrence of gain switching, the step amplifier not in use is selected to cancel offset, and the amplifier receiving the received signal is switched.
COPYRIGHT: (C)2004,JPO

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