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    • 34. 发明授权
    • Variable-gain image-reject low-noise amplifier
    • 可变增益图像抑制低噪声放大器
    • US07629850B2
    • 2009-12-08
    • US12127379
    • 2008-05-27
    • Brian Allan FloydScott Kevin Reynolds
    • Brian Allan FloydScott Kevin Reynolds
    • H03G3/30
    • H03F3/16G06F17/5063H03F3/72H03G1/0088
    • A variable-gain amplifier includes an intermediate node operative to receive an electric current from a current source. A common-emitter amplifier has a collector electrically connected to the intermediate node. A first common-base amplifier has an emitter electrically connected to the intermediate node and a collector electrically connected to an output node. A base-degenerated amplifier has an emitter electrically connected to the intermediate node and a collector electrically connected to the output node. A second common-base amplifier has an emitter electrically connected to the intermediate node and a collector electrically connected to small-signal ground. The intermediate node is operative to direct the electric current to the first common-base amplifier, thereby causing the variable-gain amplifier to operate in a first mode; and the intermediate node is operative to direct the electric current to the base-degenerated amplifier and the second common-base amplifier, thereby causing the variable-gain amplifier to operate in a second mode.
    • 可变增益放大器包括可从电流源接收电流的中间节点。 共发射极放大器具有与中间节点电连接的集电极。 第一公共基极放大器具有电连接到中间节点的发​​射极和电连接到输出节点的集电极。 基极退化放大器具有电连接到中间节点的发​​射极和电连接到输出节点的集电极。 第二公共基极放大器具有电连接到中间节点的发​​射极和电连接到小信号地的集电极。 中间节点可操作地将电流引导到第一共基放大器,从而使可变增益放大器以第一模式工作; 并且中间节点可操作地将电流引导到基极退化的放大器和第二公共基极放大器,从而使可变增益放大器在第二模式下操作。
    • 35. 发明申请
    • Frequency Multipliers Using Multi-Phase Oscillation
    • 使用多相振荡的频率乘数
    • US20090051394A1
    • 2009-02-26
    • US12127389
    • 2008-05-27
    • Scott Kevin ReynoldsMehmet SoyuerChinmaya Mishra
    • Scott Kevin ReynoldsMehmet SoyuerChinmaya Mishra
    • H03B19/00G06F17/50
    • H03F3/16G06F17/5063H03F3/72H03G1/0088
    • A method of generating an output signal from an input signal includes a step of generating a set of n signals, n being an integer greater than or equal to 3, by generating a signal for each integer i such that 0≦i≦(n−1), each signal within the set having the same frequency and approximately equal amplitude and a phase equal to (360/n)i degrees. The method also includes a step of inputting each of the set of n signals to a gate terminal of a corresponding one of a set of n transistors. Each of the transistors has a source terminal electrically connected to a common voltage drain and each of the transistors has a drain terminal electrically connected to a coupling. The coupling is electrically connected to a common voltage source. The output signal at the coupling has a frequency equal to the frequency of the input signal multiplied by n.
    • 从输入信号产生输出信号的方法包括通过产生每个整数i的信号来产生一组n个信号,n是大于或等于3的整数,使得0 <= i <=( n-1),集合内的每个信号具有相同的频率和近似相等的幅度以及等于(360 / n)i度的相位。 该方法还包括将n组信号中的每一个输入到一组n个晶体管中的相应一个的栅极端的步骤。 每个晶体管具有电连接到公共电压漏极的源极端子,并且每个晶体管具有电连接到耦合器的漏极端子。 耦合电连接到公共电压源。 耦合时的输出信号的频率等于输入信号乘以n的频率。