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    • 2. 发明授权
    • Autonulling DC bridge for real-time sensor transduction and voltage
measurements
    • 用于实时传感器转换和电压测量的自动调节直流电桥
    • US5461322A
    • 1995-10-24
    • US102835
    • 1993-08-06
    • Paul P. Bey, Jr.Thomas L. FareDavid J. Yonce
    • Paul P. Bey, Jr.Thomas L. FareDavid J. Yonce
    • G01N27/02G01R17/06G01R17/02
    • G01N27/02G01R17/06
    • A feedback operated DC bridge circuit for monitoring the voltage variations in a voltage divider circuit using a voltage controlled resistance component to reach a null balance across the bridge. Amplification is provided at higher accuracy near the null point when the voltage difference across the bridge is zero. The feedback bridge circuit includes an integrator which directly drives the controlling component to the value of the resistance in an unknown branch to force the null condition. The voltage controlled component (configured as a discrete metal oxide semiconductor device or bipolar junction transistor) and the balancing scheme are suitable for microfabrication and provides noise-rejection enhancement. The interconnected integral feedback of the autonulling DC bridge enables both a neural network for pre-processing sensor input in a spatial domain as well as general analog computation that mimics a first order differential equation in the form of the system state equation.
    • 一个反馈操作的直流电桥电路,用于使用电压控制的电阻分量来监测分压器电路中的电压变化,以达到跨桥的零平衡。 当桥上的电压差为零时,在零点附近以更高的精度提供放大。 反馈桥接电路包括一个积分器,它将控制分量直接驱动到未知分支中的电阻值,以迫使空值。 电压控制部件(配置为离散金属氧化物半导体器件或双极结型晶体管)和平衡方案适用于微细加工,并提供噪声抑制。 自动直流电桥的互连整体反馈使神经网络能够预处理空间域中的传感器输入以及以系统状态方程式的形式模拟一阶微分方程的一般模拟计算。