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热词
    • 95. 发明授权
    • Integrated circuit current reference
    • 集成电路电流参考
    • US06448811B1
    • 2002-09-10
    • US09824370
    • 2001-04-02
    • Siva G. NarendraAmaresh PangalStephen R. Mooney
    • Siva G. NarendraAmaresh PangalStephen R. Mooney
    • H03K1716
    • H03K19/0005
    • A current reference with reduced sensitivity to process variations includes a variable resistor and a control transistor. The control transistor has a generated current from source-to-drain that first passes through the variable resistor. The control transistor has a reference voltage applied to the gate, and the source-to-gate voltage is a function of the reference voltage and the voltage drop across the variable resistor. A control loop circuit measures the generated current and modifies the resistance value of the variable resistor in response. An external precision resistor is used to measure the generated current, and current variations as a result of process variations are reduced.
    • 具有对工艺变化的灵敏度降低的电流参考包括可变电阻器和控制晶体管。 控制晶体管具有从源极到漏极的第一次通过可变电阻器的发生电流。 控制晶体管具有施加到栅极的参考电压,并且源到栅极电压是参考电压和可变电阻器两端的电压降的函数。 控制回路电路测量产生的电流并且响应地修改可变电阻器的电阻值。 使用外部精密电阻来测量所产生的电流,并且减少了由于工艺变化导致的电流变化。