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    • 1. 发明申请
    • CHARGE SENSITIVE AMPLIFIER WITH HIGH COMMON MODE SIGNAL REJECTION
    • 具有高通用模式信号抑制的充电灵敏放大器
    • WO1998024176A1
    • 1998-06-04
    • PCT/US1997020872
    • 1997-11-13
    • VARIAN ASSOCIATES, INC.
    • VARIAN ASSOCIATES, INC.COLBETH, Richard, E.ALLEN, Max, J.MALLINSON, Martin
    • H03F03/45
    • H03F3/45076H03F1/223H03F3/345
    • A charge sensitive amplifier with high common mode signal rejection includes an NPN bipolar junction transistor (BJT) and a P-channel metal oxide semiconductor field effect transistor (MOSFET) connected in a totem pole circuit configuration. The BJT base terminal receives a dc reference voltage, the MOSFET gate terminal receives the incoming data signal, the MOSFET drain terminal is grounded and the BJT collector terminal provides the output voltage signal and is biased by the power supply through a resistive circuit element. The MOSFET operates as a source follower amplifier with the transconductance of the BJT serving as the load at the source terminal, while the BJT operates as a common emitter amplifier with the transconductance of the MOSFET providing emitter degeneration. The signal gains of such source follower and common emitter amplifiers are substantially equal and of opposite polarities. Therefore, any common mode signal components due to common mode input signals present at the input terminals (i.e., the BJT base and MOSFET gate terminals) which would otherwise appear within the output signal are substantially cancelled, thereby resulting in a high degree of common mode signal rejection.
    • 具有高共模信号抑制的电荷敏感放大器包括连接在图腾柱电路配置中的NPN双极结晶体管(BJT)和P沟道金属氧化物半导体场效应晶体管(MOSFET)。 BJT基极端子接收直流参考电压,MOSFET栅极端子接收输入数据信号,MOSFET漏极端子接地,BJT集电极端子提供输出电压信号,并由电源通过电阻电路元件偏置。 MOSFET作为源极跟随器放大器,BJT的跨导用作源极端子的负载,而BJT作为公共发射极放大器工作,MOSFET的跨导提供发射极退化。 这种源极跟随器和公共发射极放大器的信号增益基本相等并具有相反的极性。 因此,由于存在于输出端子(即,BJT基极和MOSFET栅极端子)处的共模输入信号的任何共模信号分量基本上被消除,从而导致高度的共模 信号抑制
    • 2. 发明申请
    • PIPELINED SAMPLE AND HOLD CIRCUIT WITH CORRELATED DOUBLE SAMPLING
    • 管路采样和保持电路与相关的双重采样
    • WO1998024092A1
    • 1998-06-04
    • PCT/US1997021164
    • 1997-11-19
    • VARIAN ASSOCIATES, INC.
    • VARIAN ASSOCIATES, INC.MALLINSON, MartinALLEN, Max, J.COLBETH, Richard, E.
    • G11C27/02
    • G11C27/026
    • A signal sampling circuit for performing correlated double sampling (CDS) of an input signal with a pipelined sample and hold architecture includes a time multiplexed integrating amplifier circuit in which the output circuit is a pipelined sample and hold circuit which provides time multiplexed input signal samples and the feedback integration capacitor is discharged between samples. At all times, one of the channels of the pipelined sample and hold circuit is providing one of the time multiplexed input signal samples while the other channel continues tracking the input signal. The feedback integration capacitor acts as a clamp to null out residual reset noise received as part of the input signal to be sampled. Hence, with the exception of that very brief period of time necessary for switching between the two pipelined sample and hold circuit channels, one of the two pipelined sample and hold circuit channels is always available for signal acquisition.
    • 一种用于执行具有流水线采样和保持架构的输入信号的相关双采样(CDS)的信号采样电路包括时间复用积分放大器电路,其中输出电路是提供时间复用输入信号样本的流水线采样和保持电路, 反馈积分电容器在采样之间放电。 在任何时候,流水线采样和保持电路的一个通道是提供时间复用输入信号采样之一,而另一个通道继续跟踪输入信号。 反馈积分电容器用作钳位,以将作为要采样的输入信号的一部分接收的残留复位噪声清零。 因此,除了在两个流水线采样和保持电路通道之间切换所需的非常短暂的时间段之外,两个流水线采样和保持电路通道之一总是可用于信号采集。
    • 3. 发明申请
    • CURRENT MODE ANALOG SIGNAL MULTIPLEXOR
    • 电流模式模拟信号多路复用器
    • WO1998024182A1
    • 1998-06-04
    • PCT/US1997021165
    • 1997-11-19
    • VARIAN ASSOCIATES, INC.
    • VARIAN ASSOCIATES, INC.ALLEN, Max, J.COLBETH, Richard, E.MALLINSON, Martin
    • H03K17/62
    • H03K17/6264H03K17/04113
    • A current mode analog signal multiplexor includes multiple input multiplexed differential amplifiers (12, 14), a reference amplifier ( 12.0, 14.0) and an output differential current amplifier (18, 20). An input multiplex control signal selects and enables one of the input multiplexed differential amplifiers for buffering and steering the input signal current to one side of the output differential current amplifier. The reference amplifier drives the other side of the output differential current amplifier. The output node of the output differential current amplifier remains at a substantially constant voltage potential while providing an output current which varies in relation to the selected input signal.
    • 电流模式信号多路复用器包括多输入多路复用差分放大器(12,14),参考放大器(12.0,14.0)和输出差分电流放大器(18,20)。 输入多路复用控制信号选择并使得其中一个输入多路复用差分放大器用于缓冲并将输入信号电流转向输出差分电流放大器的一侧。 参考放大器驱动输出差分电流放大器的另一侧。 输出差分电流放大器的输出节点保持在基本恒定的电压电位,同时提供相对于所选择的输入信号而变化的输出电流。