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21. 发明专利

JP2011250011A Switching circuit and envelope curve signal amplifier 有权
标题翻译：切换电路和包络线信号放大器
公开(公告)号：JP2011250011A
公开(公告)日：2011-12-08
申请号：JP2010119483
申请日：2010-05-25
申请人： Sumitomo Electric Ind Ltd , Toyohashi Univ Of Technology , 住友電気工業株式会社 , 国立大学法人豊橋技術科学大学
发明人： OHIRA TAKASHI , WADA KAZUYUKI , NAKADA MITSUTOSHI , HATSUKAWA SATOSHI , SHIGA NOBUO
IPC分类号： H03F3/217 , H03F1/02
CPC分类号： H03F1/0227 , H01L23/645 , H01L23/66 , H01L2223/6644 , H01L2224/48227 , H01L2924/13091 , H02M2003/1586 , H03F1/18 , H03F3/217 , H03F3/2176 , H03F3/2178 , H03F3/607 , H03F2200/102 , H03F2200/351 , H03F2200/366 , Y10T307/747 , H01L2924/00
摘要： PROBLEM TO BE SOLVED: To provide a switching circuit which can synthesize PWM signals amplified by multiple switching elements with low loss and can demodulate a modulation signal, and to provide an envelope curve signal amplifier with the switching circuit.SOLUTION: The switching circuit 33 comprises a coil L2 having one end connected with a power supply Vdd, n transistors M1, ..Mn each having a coil L3 interposed between the other end of the coil L2 and the drain D1, ..Dn, and a connection circuit which cascades the gates G1, ..Gn via the coils L1, ..L1. The transistors M1, ..Mn are turned on sequentially by PWM signals provided from an input terminal 331 and propagating through the connection circuit. When the PWM signals output from the drains D1, ..Dn through respective coils L3 are added at the other end of the coil L2, fundamental-wave of pulse width modulation and harmonics of (n-1) and subsequent orders are canceled.
摘要翻译：要解决的问题：提供一种开关电路，其可以合成由多个开关元件以低损耗放大的PWM信号并且可以解调调制信号，并且提供与开关电路的包络线信号放大器。解决方案：开关电路33包括一个线圈L2，其一端与电源Vdd连接，n个晶体管M1，..Mn分别具有插入在线圈L2的另一端和漏极D1之间的线圈L3。 .Dn，以及通过线圈L1，..L1级联栅极G1，..Gn的连接电路。晶体管M1，..Mn由输入端子331提供的PWM信号依次导通，并通过连接电路传播。当在线圈L2的另一端添加从漏极D1，..Dn输出的各个线圈L3的PWM信号时，消除脉冲宽度调制的基波和（n-1）次序和后续阶数的谐波。版权所有（C）2012，JPO＆INPIT

22. 发明专利

JP4708384B2 With gain switching low-noise amplifier circuit 有权
公开(公告)号：JP4708384B2
公开(公告)日：2011-06-22
申请号：JP2007111537
申请日：2007-04-20
申请人：ルネサスエレクトロニクス株式会社
发明人：豊五十嵐 , 昭夫山本
IPC分类号： H03F1/26 , H03G3/10
CPC分类号： H03G1/0088 , H03F1/22 , H03F3/19 , H03F3/72 , H03F2200/294 , H03F2200/366 , H03F2200/492 , H03F2203/7206

23. 发明专利

JPWO2008102788A1 プログラマブル低雑音増幅装置审中-公开
公开(公告)号：JPWO2008102788A1
公开(公告)日：2010-05-27
申请号：JP2009500202
申请日：2008-02-20
申请人：財団法人名古屋産業科学研究所
发明人：米谷　昭彦 , 昭彦米谷
IPC分类号： H03G3/00
CPC分类号： H03F1/26 , H03F1/223 , H03F3/19 , H03F3/72 , H03F2200/243 , H03F2200/294 , H03F2200/366 , H03F2200/372 , H03F2200/451 , H03F2200/492 , H03F2200/61 , H03G1/0029 , H03G1/0088
摘要：小型化が進むチューナに用いる低雑音増幅器は省電力化と低雑音化という性能を求められている。低雑音化を図るために、入信した信号のレベルに基づいて利得を変化させるようにすることが望ましい。また、省電力化や低電圧化を図るためにはトランジスタの縦積み段数を減らすことが必要である。そこで、ゲート接地されたトランジスタとカスコード接続された1対のトランジスタで構成される固定増幅器と、利得の絶対値が同じで固定増幅器の利得を加算する増幅器と減算する増幅器を複数個備え、スイッチでこれらの増幅器を選択することで全体の利得を可変にするとともに、トランジスタの縦積み段数を2段にしたプログラマブル利得可変低雑音増幅装置を提供する。

24. 发明专利

JP2008271202A Low noise amplifier circuit with gain switching 有权
标题翻译：低噪声放大器电路与增益切换
公开(公告)号：JP2008271202A
公开(公告)日：2008-11-06
申请号：JP2007111537
申请日：2007-04-20
申请人： Renesas Technology Corp , 株式会社ルネサステクノロジ
发明人： IGARASHI YUTAKA , YAMAMOTO AKIO
IPC分类号： H03F1/26 , H03G3/10
CPC分类号： H03G1/0088 , H03F1/22 , H03F3/19 , H03F3/72 , H03F2200/294 , H03F2200/366 , H03F2200/492 , H03F2203/7206
摘要： PROBLEM TO BE SOLVED: To provide a LNA (low noise amplifier) with gain switching capable of suppressing a deterioration in a noise figure.
SOLUTION: The LNA with gain switching having a first transistor group (Q11 to Q18) and a second transistor group (Q21 to Q28) has a resistor R4 connected between the emitter of the transistor Q21 and the collector of a transistor Q1, and a resistor R5 connected to the emitters of the transistors Q22 to Q28 and the collector of the transistor Q1, having a resistor R5 composed of a resistance value being as 1/7 times as high as that of the resistor R4, and has no deterioration in a noise figure because isolation of the transistors Q21 to Q28, and the transistors Q1 and Q11 to Q18 which are turned off by the resistor R4 and the resistor R5 in a high gain mode is secured.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供具有能够抑制噪声系数恶化的增益切换的LNA（低噪声放大器）。解决方案：具有第一晶体管组（Q11至Q18）和第二晶体管组（Q21至Q28）的具有增益切换的LNA具有连接在晶体管Q21的发射极和晶体管Q1的集电极之间的电阻器R4，连接到晶体管Q22〜Q28的发光极和晶体管Q1的集电极的电阻器R5，其电阻器R5为电阻值为电阻器R4的电阻值的1/7倍，不劣化因为确保了以高增益模式被电阻器R4和电阻器R5截止的晶体管Q21至Q28以及晶体管Q1和Q11至Q18的隔离。版权所有（C）2009，JPO＆INPIT

25. 发明专利

JP2008010947A Power amplifier 有权
标题翻译：功率放大器
公开(公告)号：JP2008010947A
公开(公告)日：2008-01-17
申请号：JP2006176651
申请日：2006-06-27
申请人： Toshiba Corp , 株式会社東芝
发明人： ABE KAZUHIDE , SASAKI TADAHIRO , ITAYA KAZUHIKO , FUNAKI HIDEYUKI
IPC分类号： H03F3/24 , H03F1/02 , H03F1/32 , H03G3/10
CPC分类号： H03F3/2176 , H03F1/02 , H03F3/245 , H03F2200/366 , H03F2200/391 , H03F2203/21178 , H03G1/0088
摘要： PROBLEM TO BE SOLVED: To provide a power amplifier capable of varying an output amplitude at a least cost. SOLUTION: The power amplifier includes: a plurality of field effect transistors 30 0 , 30 1 , 30 2 , 30 3 connected in parallel with each other and whose one-side terminals are respectively connected to ground; an amplifier unit including at least one of an inductor 31, a capacitor 32, and a band pass filter 33, whose one-side terminal is respectively connected to the other-side terminals of the field effect transistors and amplifier unit which outputs output signal amplified from the other end; and an amplitude control section that provides a control signal for turning ON/OFF the respective gates of the field effect transistors on the basis of an address signal and a clock signal for selecting the field effect transistors to control the amplitude of the output of the amplifier unit, and channel widths of the field effect transistors differ from each other. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供能够以至少成本改变输出幅度的功率放大器。解决方案：功率放大器包括：多个场效应晶体管30 ，30 ，30 2 ，30 3 彼此并联并且其一侧端子分别连接到地; 放大器单元，其包括电感器31，电容器32和带通滤波器33中的至少一个，其单侧端子分别连接到场效应晶体管的另一侧端子和放大单元，其输出放大的输出信号从另一端; 以及振幅控制部，其基于地址信号和用于选择场效应晶体管的时钟信号，提供用于接通/关断场效应晶体管的各个栅极的控制信号，以控制放大器的输出的幅度单位和场效应晶体管的沟道宽度彼此不同。版权所有（C）2008，JPO＆INPIT

26. 发明专利

JP2007081568A Differential operational amplifier 有权
标题翻译：差分运算放大器
公开(公告)号：JP2007081568A
公开(公告)日：2007-03-29
申请号：JP2005264287
申请日：2005-09-12
申请人： Sanyo Electric Co Ltd , 三洋電機株式会社
发明人： ONISHI AKINOBU
IPC分类号： H03F3/45
CPC分类号： H03F3/45192 , H03F3/45183 , H03F3/45475 , H03F3/45659 , H03F2200/264 , H03F2200/366 , H03F2203/45008 , H03F2203/45012 , H03F2203/45074 , H03F2203/45082 , H03F2203/45088 , H03F2203/45471 , H03F2203/45508 , H03F2203/45551 , H03F2203/45616 , H03F2203/45642
摘要： PROBLEM TO BE SOLVED: To provide a differential operational amplifier capable of suppressing deterioration in a distortion rate and reducing power consumption. SOLUTION: The differential operational amplifier for outputting first and second output voltages according to first and second input voltages comprises a differential circuit operating according to the first and second input voltages; a control voltage generation circuit for generating a control voltage for setting the intermediate voltage between the first and second output voltages to be a prescribed reference voltage; a variable current generation circuit that is connected to the differential circuit in series and generates a variable current according to the control voltage; and a constant current generation circuit that is connected to the variable current generation circuit in parallel and generates a constant current, thus performing control so that the intermediate voltage becomes a reference voltage by the variable current and the constant current. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：提供能够抑制失真率的劣化并降低功耗的差分运算放大器。解决方案：根据第一和第二输入电压输出第一和第二输出电压的差分运算放大器包括根据第一和第二输入电压工作的差分电路; 用于产生用于将所述第一和第二输出电压之间的中间电压设置为规定参考电压的控制电压的控制电压产生电路; 可变电流产生电路，其串联连接到差分电路，并根据控制电压产生可变电流; 以及并联连接到可变电流产生电路并产生恒定电流的恒定电流产生电路，从而进行控制，使得中间电压通过可变电流和恒定电流成为参考电压。版权所有（C）2007，JPO＆INPIT

27. 发明专利

JP2007053762A Amplifier circuit improved in linearity and frequency band 审中-公开
标题翻译：线性和频带改进的放大器电路
公开(公告)号：JP2007053762A
公开(公告)日：2007-03-01
申请号：JP2006221434
申请日：2006-08-15
申请人： Integrant Technologies Inc , インテグラントテクノロジーズインコーポレーテッド
发明人： KIM TAE WOOK , KIM BONKEE , LEE KWYRO
IPC分类号： H03F1/32 , H03F1/34 , H03F1/42
CPC分类号： H03F1/34 , H03F1/223 , H03F1/3205 , H03F2200/162 , H03F2200/36 , H03F2200/366 , H03F2200/432
摘要： PROBLEM TO BE SOLVED: To provide an amplifier circuit which is improved in linearity and used for a wide frequency band.
SOLUTION: The amplifier circuit comprises an amplification block comprising a main transistor comprising first, second and third terminals, wherein a current flow from the second terminal to the third terminal changes according to a voltage applied to the first terminal, an auxiliary transistor comprising fourth, fifth and sixth terminals, wherein a current flow from the fifth terminal to the sixth terminal changes according to a voltage applied to the fourth terminal, a main transistor bias unit applying a bias to make the main transistor operate in a saturation region, and an auxiliary transistor bias unit applying a bias to make the auxiliary transistor operate in a sub-threshold region, wherein the second and fifth terminals are electrically connected to each other and the first and fourth terminals are electrically connected to an input port, a first feedback block electrically connected to the third terminal, and a second feedback block electrically connected to the sixth terminal.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种线性改善并用于宽频带的放大器电路。解决方案：放大器电路包括一个放大块，它包括一个包括第一，第二和第三端子的主晶体管，其中从第二端子到第三端子的电流根据施加到第一端子的电压而变化，辅助晶体管包括第四，第五和第六端子，其中从第五端子到第六端子的电流根据施加到第四端子的电压而变化，主晶体管偏置单元施加偏压以使主晶体管在饱和区域中工作，以及辅助晶体管偏置单元，施加偏置以使辅助晶体管工作在次阈值区域，其中第二和第五端子彼此电连接，并且第一和第四端子电连接到输入端口，第一端子电连接到第三端子的反馈块和与第六项电连接的第二反馈块伊纳勒。版权所有（C）2007，JPO＆INPIT

28. 发明专利

JP2006109349A Constant current circuit and system power unit using the constant current circuit 审中-公开
标题翻译：恒定电流电路和系统电源单元使用恒流电路
公开(公告)号：JP2006109349A
公开(公告)日：2006-04-20
申请号：JP2004296479
申请日：2004-10-08
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NODA IPPEI
IPC分类号： H03F3/347 , G05F3/24 , G05F3/26
CPC分类号： G05F3/262 , G05F3/30 , H03F1/30 , H03F1/301 , H03F3/347 , H03F3/45475 , H03F2200/366 , H03F2200/447 , H03F2203/45136
摘要： PROBLEM TO BE SOLVED: To obtain a constant current circuit in which a plurality of high-accuracy constant currents are generated while reducing variations with respect to manufacture process variations or temperature variations and can be supplied as a bias current, and a system power unit using the constant current circuit.
SOLUTION: An operational amplifying circuit AMP controls operations of PMOS transistors M1 and M2 so as to cancel variations of one of currents i1 and i2 flowing from the PMOS transistors M1 and M2 by applying negative feedback to the variations and while defining, as a reference current, a constant current flowing through a resistor R1 connected to a potential difference caused by a different of densities of currents flowing through two pnp transistors Q1 and Q2 to which currents are correspondingly supplied from the PMOS transistors M1 and M2, currents in proportion with the reference current are generated and outputted, respectively by PMOS transistors MA1-MAn of which operations are controlled by the operational amplifying circuit AMP.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了获得其中产生多个高精度恒定电流的恒定电流电路，同时减少相对于制造工艺变化或温度变化的变化，并且可以作为偏置电流提供系统电源单元采用恒流电路。解决方案：运算放大电路AMP控制PMOS晶体管M1和M2的操作，以便消除从PMOS晶体管M1和M2流过的电流i1和i2之一的变化，通过对变化施加负反馈，同时定义为参考电流，流过电阻器R1的恒定电流，其连接到由流经两个pnp晶体管Q1和Q2的不同电流密度引起的电位差，电流从PMOS晶体管M1和M2相应地提供给电流，电流成比例其中参考电流分别由其中操作由操作放大电路AMP控制的PMOS晶体管MA1-MAn分别产生和输出。版权所有（C）2006，JPO＆NCIPI

29. 发明专利

JP5369388B2 Semiconductor device 有权
公开(公告)号：JP5369388B2
公开(公告)日：2013-12-18
申请号：JP2007137127
申请日：2007-05-23
申请人：三菱電機株式会社
发明人：晃井上 , 清毅後藤 , 康金谷 , 伸介渡辺
IPC分类号： H01L21/337 , H01L21/338 , H01L21/822 , H01L27/04 , H01L29/808 , H01L29/812
CPC分类号： H03F1/523 , H03F3/195 , H03F3/211 , H03F2200/211 , H03F2200/366 , H03F2200/381
摘要： A current limiting circuit is connected to the gate (input terminal) of an amplifying transistor. The current limiting circuit includes a protecting transistor, a first protecting resistor connecting the drain to the gate of the protecting transistor, and a second protecting resistor connecting the source to the gate of the protecting transistor. The current limiting circuit limits current, so that electric power larger than the maximum electric power allowable for the amplifying transistor does not pass.

30. 发明专利

JP5195145B2 Differential amplifier 有权
公开(公告)号：JP5195145B2
公开(公告)日：2013-05-08
申请号：JP2008205523
申请日：2008-08-08
申请人：富士通株式会社
发明人：真大工藤
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F3/193 , H03F2200/366 , H03F2200/411 , H03F2203/45352 , H03F2203/45364 , H03F2203/45512 , H03F2203/45668 , H03F2203/45702 , H03F2203/45722

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