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    1.
    发明专利
    未知

    公开(公告)号：AT402522T

    公开(公告)日：2008-08-15

    申请号：AT01979671

    申请日：2001-10-09

    Applicant: QUALCOMM INC

    Inventor： WALKER BRETT ,  ZEISEL ERIC ,  SAHOTA GURKANWAL

    IPC: H03G7/00 ,  H03G7/06 ,  G06G7/24 ,  H03G3/10 ,  H03G3/30 ,  H03G7/08

    Abstract: Techniques to linearly (in dB) adjust the gains of variable gain elements (i.e., variable gain amplifiers or VGAs) in a receiver or transmitter. An input control signal is provided to a conditioning circuit that conditions the control signal to achieve various signal characteristics. The input control signal is limited to within a particular range of values, temperature compensated, scaled (or normalized) to the supply voltages, shifted with an offset, or manipulated in other fashions. The conditioned signal is then provided to an input stage of a linearizer that generates a set of exponentially related signals. This is achieved using, for example, a differential amplifier in which the conditioned control signal is applied to the inputs of the differential amplifier and the collector currents from the differential amplifier comprises the exponentially related signals. An output stage within the linearizer receives the exponentially related signals and, in response, generates a gain control signal. By approximately matching the output stage to a gain stage of the variable gain element and by using the gain control signal generated by output stage, the gain transfer function of the VGA approximates that of the exponentially related signals.

    2.
    发明专利
    未知

    公开(公告)号：DE60135027D1

    公开(公告)日：2008-09-04

    申请号：DE60135027

    申请日：2001-10-09

    Applicant: QUALCOMM INC

    Inventor： WALKER BRETT C ,  ZEISEL ERIC ,  SAHOTA GURKANWAL S

    IPC: H03G7/00 ,  H03G7/06 ,  G06G7/24 ,  H03G3/10 ,  H03G3/30 ,  H03G7/08

    Abstract: Techniques to linearly (in dB) adjust the gains of variable gain elements (i.e., variable gain amplifiers or VGAs) in a receiver or transmitter. An input control signal is provided to a conditioning circuit that conditions the control signal to achieve various signal characteristics. The input control signal is limited to within a particular range of values, temperature compensated, scaled (or normalized) to the supply voltages, shifted with an offset, or manipulated in other fashions. The conditioned signal is then provided to an input stage of a linearizer that generates a set of exponentially related signals. This is achieved using, for example, a differential amplifier in which the conditioned control signal is applied to the inputs of the differential amplifier and the collector currents from the differential amplifier comprises the exponentially related signals. An output stage within the linearizer receives the exponentially related signals and, in response, generates a gain control signal. By approximately matching the output stage to a gain stage of the variable gain element and by using the gain control signal generated by output stage, the gain transfer function of the VGA approximates that of the exponentially related signals.

    Gain linearizer for variable gain amplifiers
    5.
    发明专利
    Gain linearizer for variable gain amplifiers 未知

    公开(公告)号：AU1160602A

    公开(公告)日：2002-04-22

    申请号：AU1160602

    申请日：2001-10-09

    Applicant: QUALCOMM INC

    Inventor： WALKER BRETT C ,  ZEISEL ERIC ,  SAHOTA GURKANWAL S

    IPC: H03G7/06 ,  H03G3/10 ,  H03G3/30 ,  H03G7/08 ,  H03G7/00

    Abstract: Techniques to linearly (in dB) adjust the gains of variable gain elements (i.e., variable gain amplifiers or VGAs) in a receiver or transmitter. An input control signal is provided to a conditioning circuit that conditions the control signal to achieve various signal characteristics. The input control signal is limited to within a particular range of values, temperature compensated, scaled (or normalized) to the supply voltages, shifted with an offset, or manipulated in other fashions. The conditioned signal is then provided to an input stage of a linearizer that generates a set of exponentially related signals. This is achieved using, for example, a differential amplifier in which the conditioned control signal is applied to the inputs of the differential amplifier and the collector currents from the differential amplifier comprises the exponentially related signals. An output stage within the linearizer receives the exponentially related signals and, in response, generates a gain control signal. By approximately matching the output stage to a gain stage of the variable gain element and by using the gain control signal generated by output stage, the gain transfer function of the VGA approximates that of the exponentially related signals.

    GAIN LINEARIZER FOR VARIABLE GAIN AMPLIFIERS
    6.
    发明申请
    GAIN LINEARIZER FOR VARIABLE GAIN AMPLIFIERS 审中-公开
    用于可变增益放大器的增益线性化器

    公开(公告)号：WO0231973A2

    公开(公告)日：2002-04-18

    申请号：PCT/US0131696

    申请日：2001-10-09

    Applicant: QUALCOMM INC

    Inventor： WALKER BRETT C ,  ZEISEL ERIC ,  SAHOTA GURKANWAL S

    IPC: H03G7/06 ,  H03G3/10 ,  H03G3/30 ,  H03G7/08 ,  H03G7/00

    CPC classification number: H03G7/08

    Abstract: Techniques to linearly (in dB) adjust the gains of variable gain elements (i.e., variable gain amplifiers or VGAs) in a receiver of transmitter. An input control signal is provided to a conditioning circuit that conditions the control signal to achieve various signal characteristics. The input control signal is limited to within a particular range of values, temperature compensated, scaled (or normalized) to the supply voltages, shifted with an offset, or manipulated in other fashions. The conditioned signal is then provided to an input stage of a linearizer that generates a set of exponentially related signals. This is achieved using, for example, a differential amplifier in which the conditioned control signal is applied to the inputs of the differential amplifier and the collector currents from the differential amplifier comprises the exponentially related signals. An output stage within the linearizer receives the exponentially related signals and, in response, generates a gain control signal. By approximately matching the output stage to a gain stage of the variable gain element and by using the gain control signal generated by output stage, the gain transfer function of the VGA approximates that of the exponentially related signals.

    Abstract translation: 线性（以dB为单位）的技术调整发射机接收机中可变增益元件（即可变增益放大器或VGA）的增益。 输入控制信号被提供给调节电路，其调节控制信号以实现各种信号特性。 输入控制信号被限制在特定值范围内，温度补偿，缩放（或归一化）到电源电压，以偏移量移位或以其他方式操纵。 然后将经调节的信号提供给产生一组指数相关信号的线性化器的输入级。 这是通过使用例如差分放大器实现的，其中调节控制信号被施加到差分放大器的输入端，并且来自差分放大器的集电极电流包括与指数相关的信号。 线性化器内的输出级接收指数相关信号，并作为响应产生增益控制信号。 通过将输出级与可变增益元件的增益级大致匹配，并且通过使用由输出级产生的增益控制信号，VGA的增益传递函数近似于指数相关信号的增益传递函数。

    ADJUSTMENT OF BIAS CURRENT IN A FIRST INTEGRATED CIRCUIT BASED ON A SIGNAL GAIN OF A SECOND INTEGRATED CIRCUIT
    7.
    发明申请
    ADJUSTMENT OF BIAS CURRENT IN A FIRST INTEGRATED CIRCUIT BASED ON A SIGNAL GAIN OF A SECOND INTEGRATED CIRCUIT 审中-公开
    基于第二集成电路信号增益的第一集成电路中偏置电流的调整

    公开(公告)号：WO0231996A2

    公开(公告)日：2002-04-18

    申请号：PCT/US0131694

    申请日：2001-10-09

    Applicant: QUALCOMM INC

    Inventor： WALKER BRETT C ,  ZEISEL ERIC

    IPC: H03F1/02 ,  H03G3/10 ,  H03G3/30 ,  H04B1/04 ,  H04B1/00

    CPC classification number: H03G3/3042 ,  H03F1/02 ,  H03F1/0266 ,  H03F3/24 ,  H04B2001/0416 ,  H04B2001/045

    Abstract: A technique of adjusting the bias current of an active circuit in a transmit signal path based on the signal gain(s) of variable gain element(s) located prior to the active circuit. The technique is particularly advantageous when the gain element(s) are located on one IC (e.g., that implements an IF portion) and the active circuit is implemented on another IC (e.g., that implements a RF portion). The bias current of the active circuit is set based, in part, on the input power level, which may be inferred from the gain control signal(s) used to control the preceding variable gain elements. Initially, at least one gain control signal. A bias current for the active circuit is then determined based, in part, on the estimated input signal level. The active circuit is biased with the determined bias current. The biased current can be limited to a range defined by an upper bias current and a lower bias current.

    Abstract translation: 基于位于有源电路之前的可变增益元件的信号增益来调整发射信号路径中的有源电路的偏置电流的技术。 当增益元件位于一个IC上（例如，实现IF部分）并且有源电路在另一个IC（例如，实现RF部分）上实现时，该技术是特别有利的。 有源电路的偏置电流部分地基于可以从用于控制先前的可变增益元件的增益控制信号推断的输入功率电平来设定。 最初，至少有一个增益控制信号。 然后，部分地基于估计的输入信号电平来确定有源电路的偏置电流。 有源电路由确定的偏置电流偏置。 偏置电流可以限制在由上偏置电流和较低偏置电流限定的范围内。

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