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59 条记录 (耗时 0.012 秒)

    IMPROVED RADIO FREQUENCY DIGITAL-TO-ANALOG CONVERTER
    21.
    发明公开
    IMPROVED RADIO FREQUENCY DIGITAL-TO-ANALOG CONVERTER 有权
    改进的无线电频率数字 - 模拟转换器

    公开(公告)号：EP1869769A2

    公开(公告)日：2007-12-26

    申请号：EP04786460.8

    申请日：2004-08-04

    申请人： STMicroelectronics, Inc.

    发明人： NORSWORTHY, Steven, R. ,  THAM, Andrew ,  REDGRAVE, Jason, Rupert ,  GREY, Aubrey, Arthur

    IPC分类号： H03M1/00

    CPC分类号： H03F3/3432 ,  H03F1/22 ,  H03F2200/331 ,  H03M1/0863 ,  H03M1/742

    摘要： A radio frequency digital-to-analog converter with a programmable current output. In exemplary aspects of the invention, improved apparatus and methods for providing (i) current mirror matching, (ii) enhanced current pulse rising edge performance, (ii) reduced base voltage swing, and (iv) compensated high voltage swing, are provided. The foregoing apparatus and methods can be applied to any RF signal application (wireless or otherwise), including for example wireless cellular handsets.

    摘要翻译： 具有可编程电流输出的射频数字 - 模拟转换器。 在本发明的示例性方面中，提供了用于提供（i）电流镜像匹配，（ii）增强的电流脉冲上升沿性能，（ii）降低的基极电压摆幅和（iv）补偿的高电压摆幅的改进的装置和方法。 上述装置和方法可以应用于任何RF信号应用（无线或其他），包括例如无线蜂窝手机。

    HIGH-FREQUENCY AMPLIFIER CIRCUIT WITH NEGATIVE IMPEDANCE CANCELLATION
    25.
    发明授权
    HIGH-FREQUENCY AMPLIFIER CIRCUIT WITH NEGATIVE IMPEDANCE CANCELLATION 有权
    高频放大器电路消除的负阻抗的

    公开(公告)号：EP1297621B1

    公开(公告)日：2005-04-06

    申请号：EP01956488.9

    申请日：2001-06-19

    申请人： Koninklijke Philips Electronics N.V.

    发明人： LUO, Sifen ,  SOWLATI, Tirdad

    IPC分类号： H03F1/00

    CPC分类号： H03F3/19 ,  H03F1/301 ,  H03F3/193 ,  H03F3/3432 ,  H03F3/345

    摘要： A high-frequency amplifier circuit includes an amplifying transistor and a driver transistor, with the amplifying transistor being connected in either a common emitter or a common source configuration and the driver transistor being connected in a corresponding common collector or a common drain configuration, depending upon whether bipolar or field effect transistors are used. A current-mirror bias circuit is coupled between an input terminal and an output terminal of the driver transistor, with a resistor being provided for coupling the current mirror to the input terminal of the driver transistor. The resistor, which typically has a value of between about 20 and 100 ohms, provides a negative impedance cancellation effect while minimizing power consumption at low bias levels.

    INTEGRATED CIRCUIT WITH AN AMPLIFIER
    26.
    发明公开
    INTEGRATED CIRCUIT WITH AN AMPLIFIER 审中-公开
    集成电路带功放

    公开(公告)号：EP1459442A2

    公开(公告)日：2004-09-22

    申请号：EP02781601.6

    申请日：2002-11-26

    申请人： Koninklijke Philips Electronics N.V.

    发明人： BREUNISSE, Rainier, A., S.

    IPC分类号： H03G1/00

    CPC分类号： H03G1/0023 ,  H03F3/3432 ,  H03F3/45085 ,  H03F2203/45352

    摘要： An amplifier circuit comprises an input transistor Q1with a first control electrode coupled to the input In and a first main current channel coupled to the internal node 10. An output transistor Q4 has a second control electrode coupled to the internal node 10 and a second main current channel coupled to the output Out of the amplifier. An internal transistor Q2 has a third main current channel coupled to the internal node 10. The internal transistor Q2 serves to modify the impedance at the internal node 10, but a main low-frequency gain path from the first main channel Q1 to the second control electrode does not pass through the third main current channel Q2. The internal node 10 is coupled to ground via the third main current channel Q2 and a resistive element R1 successively. The resistance value of the resistive element R1 causes poles of a transfer function of the amplifier circuit to develop an imaginary frequency (resonant) component.

    DIFFERENTIAL CHARGE PUMP
    27.
    发明公开
    DIFFERENTIAL CHARGE PUMP 有权
    差分电荷泵

    公开(公告)号：EP1421694A2

    公开(公告)日：2004-05-26

    申请号：EP02751491.8

    申请日：2002-07-10

    申请人： Koninklijke Philips Electronics N.V.

    发明人： SANDULEANU, Mihai, A., T.

    IPC分类号： H03L7/089 ,  H04L7/033

    CPC分类号： H03L7/0805 ,  H03F3/3432 ,  H03F3/453 ,  H03F3/45874 ,  H03F3/45887 ,  H03F2203/45298 ,  H03F2203/45352 ,  H03L7/07 ,  H03L7/087 ,  H03L7/0896 ,  H03L7/14 ,  H03L2207/06

    摘要： The present invention relates to a differential charge pump, in particular for use in a tuning system including a phase-locked loop, for generating currents, comprising a first input (IN+) and an inverse second input (IN-), in particular for receiving differential signals from a phase comparator, first current source means (Q1) for generating a first current (kIo) in accordance with the signal inputted into said first input (IN+), second current source means (Q2) for generating an inverse second current (kIo) in accordance with the signal inputted into said second input (IN-); and a first output (OUT+) and a second output (OUT-) for outputting said first and second currents, respectively. Further, the differential charge pump comprises a first controllable common mode current source means (14) for additionally feeding common mode current to said first output (OUT+), a second controllable common mode current source means (16) for additionally feeding common mode current (IBIAS2) to said second output (OUT-), and common mode controlling means (6) for controlling said first and second common mode current source means (14, 16) so as to make the common mode currents essentially equal to the currents (kIo) generated by said first and second current source means (Q1, Q2), respectively.

    A preamplifier
    29.
    发明公开
    A preamplifier 失效
    EinVorverstärker

    公开(公告)号：EP0736967A2

    公开(公告)日：1996-10-09

    申请号：EP96302434.4

    申请日：1996-04-04

    申请人： NEC CORPORATION

    发明人： Nagahori, Takeshi ,  Araki, Soichiro ,  Hatakeyama, Ichiro ,  Miyoshi, Kazunori

    IPC分类号： H03F3/08

    CPC分类号： H03F3/08 ,  H03F3/3432

    摘要： In a preamplifier for amplifying an input signal supplied to an input terminal to supply an amplified output signal and a reference output signal to an output terminal and a reference output terminal, respectively, a reference level circuit produces a reference level. An amplifier is connected to the reference level circuit and has a predetermined structure. The amplifier amplifies the input signal into the amplified output signal with reference to the reference level to supply the amplified output signal to the output terminal. A dummy circuit is connected to the reference level circuit and has a structure which is identical with the predetermined structure. The dummy circuit responds to the reference level to produce the reference output signal related to the amplified output signal.

    摘要翻译： 在用于放大提供给输入端子的输入信号的前置放大器中，分别向输出端子和参考输出端子提供放大的输出信号和参考输出信号，参考电平电路产生参考电平。 放大器连接到参考电平电路并具有预定的结构。 放大器将参考电平将输入信号放大到放大的输出信号，以将放大的输出信号提供给输出端。 虚设电路连接到基准电平电路，具有与预定结构相同的结构。 虚拟电路响应于参考电平以产生与放大的输出信号相关的参考输出信号。

    Current-voltage conversion circuit
    30.
    发明公开
    Current-voltage conversion circuit 有权
    斯特罗姆-Spannung-Wandlungsschaltung

    公开(公告)号：EP2424107A2

    公开(公告)日：2012-02-29

    申请号：EP11173807.6

    申请日：2011-07-13

    申请人： Onkyo Corporation

    发明人： Kawaguchi, Tsuyoshi ,  Kitagawa, Norimasa ,  Sekiya, Mamoru ,  Takehara, Yu

    IPC分类号： H03F3/30

    CPC分类号： H03F3/3076 ,  H03F1/307 ,  H03F1/3217 ,  H03F3/3066 ,  H03F3/3432 ,  H03F2200/447 ,  H03F2200/91 ,  H03F2203/30078 ,  H03F2203/30111

    摘要： A current-voltage conversion circuit comprises: a first transistor provided in an input stage; a second transistor provided in the input stage and has polarity different from that of the first transistor; and a bias circuit. A first terminal of the first transistor and a first terminal of the second transistor are connected to an input terminal into which an input current is input, a second terminal of the first transistor is connected to a first predetermined potential, a second terminal of the second transistor is connected to a second predetermined potential, the bias circuit is connected between the control terminal of the first transistor and the control terminal of the second transistor.

    摘要翻译： 电流 - 电压转换电路包括：设置在输入级中的第一晶体管; 设置在所述输入级中并具有与所述第一晶体管的极性不同的极性的第二晶体管; 和偏置电路。 第一晶体管的第一端子和第二晶体管的第一端子连接到输入电流输入的输入端子，第一晶体管的第二端子连接到第一预定电位，第二端子的第二端子连接到第二晶体管的第二端子， 晶体管连接到第二预定电位，偏置电路连接在第一晶体管的控制端和第二晶体管的控制端之间。