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    • 26. 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。
    • 28. 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。