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    • 2. 发明申请
    • SEMICONDUCTOR DEVICE
    • 半导体器件
    • US20130256660A1
    • 2013-10-03
    • US13685859
    • 2012-11-27
    • Kazuhide ABEAtsuko IIDAKazuhiko ITAYAJunji WADATSUMIShouhei KOUSAI
    • Kazuhide ABEAtsuko IIDAKazuhiko ITAYAJunji WADATSUMIShouhei KOUSAI
    • H01L29/84
    • H01L29/84H01L2924/1461H03H9/2405H03H2009/02314
    • A semiconductor device according to an embodiment has: a semiconductor substrate; an acoustic resonator formed on the semiconductor substrate, having a semiconductor layer including impurity electrically isolated from the substrate by depletion layer and configured to resonate at a predetermined resonance frequency based on acoustic standing wave excited in the semiconductor layer; a temperature detector formed on the semiconductor substrate and configured to detect temperature of the semiconductor substrate; a calculating unit formed on the semiconductor substrate and configured to perform calculation of temperature compensation based on the temperature detected by the temperature detector, kind of the impurity and concentration of the impurity; and a controller formed on the semiconductor substrate and configured to control the resonance frequency based on a result of the calculation by the calculating unit.
    • 根据实施例的半导体器件具有:半导体衬底; 形成在所述半导体衬底上的声谐振器,具有包括通过耗尽层与所述衬底电绝缘的杂质的半导体层,并且被配置为基于在所述半导体层中激发的声驻波以预定的谐振频率谐振; 温度检测器,形成在所述半导体衬底上,并被配置为检测所述半导体衬底的温度; 计算单元,其形成在所述半导体基板上,并且被配置为基于由所述温度检测器检测到的温度进行温度补偿的计算,所述杂质的种类和所述杂质的浓度; 以及控制器,其形成在所述半导体基板上,并且被配置为基于所述计算单元的计算结果来控制所述共振频率。
    • 5. 发明授权
    • Power amplifier
    • 功率放大器
    • US07619470B2
    • 2009-11-17
    • US11687770
    • 2007-03-19
    • Kazuhide AbeTadahiro SasakiKazuhiko ItayaHideyuki Funaki
    • Kazuhide AbeTadahiro SasakiKazuhiko ItayaHideyuki Funaki
    • H03F3/217
    • H03F3/2176H03F1/02H03F3/245H03F2200/366H03F2200/391H03F2203/21178H03G1/0088
    • A power amplifier includes: a plurality of field effect transistors connected in parallel and each having a first and second ends, the first end being connected to ground; an amplifying unit which includes at least one of an inductor, a capacitor and a band pass filter and has a third and fourth ends, the third end being connected to the second ends of the field effect transistors, and the fourth end outputting an amplified output signal; and an amplitude controller which sends control signals respectively to gates of the field effect transistors to turn on or off the field effect transistors based on an address signal for performing selection on the field effect transistors and a clock signal. Channel widths of the field effect transistors are different from each other.
    • 功率放大器包括:多个并联连接的场效应晶体管,每个具有第一和第二端,所述第一端连接到地; 放大单元,其包括电感器,电容器和带通滤波器中的至少一个,并具有第三和第四端,第三端连接到场效应晶体管的第二端,第四端输出放大的输出 信号; 以及幅度控制器,其基于用于对场效应晶体管进行选择的地址信号和时钟信号,分别向场效应晶体管的栅极发送控制信号以导通或关闭场效应晶体管。 场效应晶体管的沟道宽度彼此不同。
    • 7. 发明授权
    • Power amplifier and transmission and reception system
    • 功率放大器和发射和接收系统
    • US07508268B2
    • 2009-03-24
    • US11857737
    • 2007-09-19
    • Tadahiro SasakiKazuhide AbeKazuhiko ItayaHideyuki Funaki
    • Tadahiro SasakiKazuhide AbeKazuhiko ItayaHideyuki Funaki
    • H03F3/68
    • H03F3/604H01L21/823425H01L27/088H03F1/3205H03F3/16H03F3/607H03F3/72H03F2200/108H03F2200/451H03F2200/468H03F2200/543H03F2200/78H03F2203/7236
    • A power amplifier includes: a first multi-finger FET formed on a semiconductor substrate; a second multi-finger FET formed on the semiconductor substrate; a first temperature detector which detects a channel temperature of the first FET; a second temperature detector which detects a channel temperature of the second FET; a third temperature detector which detects a temperature of the semiconductor substrate; a first detection circuit detecting a difference between an output of the first temperature detector and an output of the third temperature detector and converting the difference to thermoelectromotive force; a second detection circuit detecting a difference between an output of the second temperature detector and the output of the third temperature detector and converting the difference to thermoelectromotive force; and a comparator comparing outputs of the first and second detection circuits with each other to turn on one of the first and second switches and turn off the other.
    • 功率放大器包括:形成在半导体衬底上的第一多指FET; 形成在半导体衬底上的第二多指FET; 第一温度检测器,其检测第一FET的通道温度; 第二温度检测器,其检测第二FET的通道温度; 第三温度检测器,其检测半导体衬底的温度; 第一检测电路,检测第一温度检测器的输出和第三温度检测器的输出之间的差异,并将差值转换为热电动势; 第二检测电路,检测第二温度检测器的输出与第三温度检测器的输出之间的差异,并将差值转换为热电动势; 以及比较器,将第一和第二检测电路的输出彼此进行比较,以打开第一和第二开关中的一个并且关闭另一个。