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Patent Agency Ranking
公开(公告)号：US09841486B2
公开(公告)日：2017-12-12
申请号：US14714235
申请日：2015-05-15
Inventor： Taiji Akizuki , Masaki Kanemaru
CPC classification number: G01R35/005 , G01R19/0084 , H02J5/005 , H03F1/02 , H03F3/24 , H03G3/3036 , H04B1/04 , H04B1/0458 , H04B1/0475 , H04B1/0483 , H04B2001/045
Abstract: A detection calibration circuit includes a first distributor distributing a high frequency input signal, an amplifier amplifying the first high frequency output signal of the first distributor, a second distributor distributing the amplified first high frequency output signal of the first distributor, a reference signal generator outputting a reference signal in accordance with a switchable reference voltage, a switcher selecting a third high frequency output signal of the second distributor or a reference signal of the reference signal generator and outputting the selected signal, a detector detecting the third high frequency output signal of the second distributor or the reference signal of the reference signal generator from the switcher, a sensitivity switcher adjusting a sensitivity for an output signal of the detector, and a calibration control circuit adjusting a detection gain of an input signal of the detector and an input-output sensitivity for an output signal of the detector.
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公开(公告)号：US09917660B2
公开(公告)日：2018-03-13
申请号：US15151372
申请日：2016-05-10
Inventor： Shigeki Nakamura , Noriaki Saito , Taiji Akizuki
CPC classification number: H04B17/13 , H03F1/02 , H03F3/195 , H03F3/24 , H03G3/3042 , H04B1/0475 , H04B2001/045
Abstract: A wireless communication device includes a baseband variable gain amplifier that amplifies a transmission baseband signal, a local variable gain amplifier that amplifies a local signal, a frequency-conversion circuit that mixes the amplified transmission baseband signal and the amplified local signal to carry out a frequency conversion into a transmission high-frequency signal, a first detector that detects a power of the transmission high-frequency signal, and a controller that controls at least one of a gain of the transmission baseband variable gain amplifier and a gain of the local variable gain amplifier on the basis of the detected power of the transmission high-frequency signal so that a power of the transmission high-frequency signal to be detected takes a predetermined value.
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公开(公告)号：US09287828B2
公开(公告)日：2016-03-15
申请号：US14398772
申请日：2014-02-26
Inventor： Taiji Akizuki , Junji Sato
IPC: H03D7/14
CPC classification number: H03D7/1441 , H03D7/1458 , H03D7/1491 , H03D2200/0023 , H03D2200/0066 , H03D2200/0088
Abstract: A balun converts a single-ended radio-frequency signal into differential signals. A differential matching circuit outputs a maximum-level positive-phase output signal at a lower or higher frequency than the center frequency and outputs a maximum-level reverse-phase output signal at a higher or lower frequency than the center frequency. An amplification circuit amplifies a positive-phase output signal and a reverse-phase output signal of the differential matching circuit. A mixing circuit converts the positive-phase output signal and the reverse-phase output signal that are output from the amplification circuit into intermediate-frequency signals using locally generated signals.
Abstract translation: 平衡 - 不平衡变换器将单端射频信号转换为差分信号。 差分匹配电路以比中心频率更低或更高的频率输出最大电平的正相输出信号，并以比中心频率更高或更低的频率输出最大电平的反相输出信号。 放大电路放大差分匹配电路的正相输出信号和反相输出信号。 混合电路使用本地产生的信号将从放大电路输出的正相输出信号和反相输出信号转换成中频信号。
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公开(公告)号：US20150137869A1
公开(公告)日：2015-05-21
申请号：US14398772
申请日：2014-02-26
Inventor： Taiji Akizuki , Junji Sato
IPC: H03D7/14
CPC classification number: H03D7/1441 , H03D7/1458 , H03D7/1491 , H03D2200/0023 , H03D2200/0066 , H03D2200/0088
Abstract: A balun converts a single-ended radio-frequency signal into differential signals. A differential matching circuit outputs a maximum-level positive-phase output signal at a lower or higher frequency than the center frequency and outputs a maximum-level reverse-phase output signal at a higher or lower frequency than the center frequency. An amplification circuit amplifies a positive-phase output signal and a reverse-phase output signal of the differential matching circuit. A mixing circuit converts the positive-phase output signal and the reverse-phase output signal that are output from the amplification circuit into intermediate-frequency signals using locally generated signals.
Abstract translation: 平衡 - 不平衡变换器将单端射频信号转换为差分信号。 差分匹配电路以比中心频率更低或更高的频率输出最大电平的正相输出信号，并以比中心频率更高或更低的频率输出最大电平的反相输出信号。 放大电路放大差分匹配电路的正相输出信号和反相输出信号。 混合电路使用本地产生的信号将从放大电路输出的正相输出信号和反相输出信号转换成中频信号。
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公开(公告)号：US09748909B2
公开(公告)日：2017-08-29
申请号：US15179977
申请日：2016-06-11
Inventor： Taiji Akizuki , Takahiro Shima
CPC classification number: H03F3/19 , H03F1/30 , H03F3/195 , H03F3/24 , H03F3/245 , H03F2200/204 , H03F2200/207 , H03F2200/405 , H03F2200/408 , H03F2200/447 , H03F2200/451 , H03F2200/78 , H03G3/3042 , H03G7/08 , H04B1/16 , H04B2001/0408
Abstract: A gain control circuit includes: a gain switching controller that changes the gains of a fundamental frequency amplifier and an N-multiplied frequency amplifier; and a detection voltage comparator that determines whether the operating state of an N-multiplier is a saturated operation or a linear operation. The detection voltage comparator determines the operating state of the N-multiplier by comparing an amount of change in a detection signal (first detection signal) representing a fundamental frequency signal with respect to an amount of change in the gain of the fundamental frequency amplifier with an amount of change in a detection signal (second detection signal) representing a high-frequency signal with respect to the amount of change in the gain of the fundamental frequency amplifier. The gain switching controller adjusts the gains of the fundamental frequency amplifier and the N-multiplied frequency amplifier on the basis of the operating state of the N-multiplier.
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