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    • 34. 发明申请
    • CMOS COMPARATOR WITH HYSTERESIS
    • 具有HYSTERESIS的CMOS比较器
    • US20090115458A1
    • 2009-05-07
    • US11936125
    • 2007-11-07
    • Frank CarrAhmed A. Emira
    • Frank CarrAhmed A. Emira
    • H03K19/20H03K19/0948
    • H03K3/3565
    • A complementary metal oxide semiconductor (CMOS) comparator circuit includes a plurality of p-type metal-oxide-semiconductor (PMOS) transistors receiving an input voltage signal, a plurality of n-type metal-oxide-semiconductor (NMOS) transistors operatively connected to the PMOS transistors and adapted to receive the input voltage signal, and an inverter adapted to invert the input voltage signal into an output voltage signal. An effective aspect ratio of the PMOS and NMOS transistors may be dependent on the level of the output voltage signal from the inverter. When a digital output of the inverter is “1”, the effective aspect ratio of the NMOS transistor is increased by turning on a second NMOS transistor, and a threshold voltage of the inverter is decreased.
    • 互补金属氧化物半导体(CMOS)比较器电路包括接收输入电压信号的多个p型金属氧化物半导体(PMOS)晶体管,多个n型金属氧化物半导体(NMOS)晶体管,可操作地连接到 所述PMOS晶体管并且适于接收所述输入电压信号;以及逆变器,其适于将所述输入电压信号反转为输出电压信号。 PMOS和NMOS晶体管的有效长宽比可以取决于来自逆变器的输出电压信号的电平。 当逆变器的数字输出为“1”时,通过接通第二NMOS晶体管来增加NMOS晶体管的有效长宽比,并且逆变器的阈值电压降低。
    • 37. 发明申请
    • Low power highly linear RF downconverter
    • 低功率高线性RF下变频器
    • US20070218857A1
    • 2007-09-20
    • US11378558
    • 2006-03-17
    • Aly IsmailEdward YoussoufianHassan ElwanFrank Carr
    • Aly IsmailEdward YoussoufianHassan ElwanFrank Carr
    • H04B1/26
    • H03D7/161
    • A technique for downconverting a RF signal comprises an antenna adapted to receive an RF signal; a transconductance amplifier connected to the antenna and adapted to amplify the RF signal; a passive mixer connected to the transconductance amplifier and adapted for current domain mixing of electrical current transferred from the transconductance amplifier; and a load impedance connected to the passive mixer. The load impedance may comprise a parallel combination of a frequency dependent negative resistance component, a capacitor, and a resistor. The load impedance may comprise a pair of complex poles, a pair of imaginary zeros, and a real pole. Voltages at an input and an output of the passive mixer are related such that the input voltage of the passive mixer is an upconverted version of the output voltage of the passive mixer, wherein the input voltage of the passive mixer is at an output of the transconductance amplifier.
    • 用于下变频RF信号的技术包括适于接收RF信号的天线; 连接到天线并适于放大RF信号的跨导放大器; 连接到跨导放大器的无源混频器,适用于从跨导放大器传输的电流的电流域混合; 以及连接到无源混频器的负载阻抗。 负载阻抗可以包括频率依赖负电阻分量,电容器和电阻器的并联组合。 负载阻抗可以包括一对复极点,一对假想零点和实数极点。 无源混频器的输入和输出端的电压与无源混频器的输入电压是无源混频器的输出电压的上变频版本相关,其中无源混频器的输入电压处于跨导输出端 放大器