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    • 9. 发明授权
    • Temperature-compensated reference voltage generator and method therefor
    • 温度补偿参考电压发生器及其方法
    • US6111397A
    • 2000-08-29
    • US120622
    • 1998-07-22
    • David Leung
    • David Leung
    • G05F3/24G05F3/26G05F3/16
    • G05F3/245G05F3/262Y10S323/907
    • A reference voltage generator for producing a regulated, temperature-compensated output voltage from an unregulated power supply voltage is provided herein. The reference voltage generator includes a pre-regulating circuit and a temperature-compensating circuit. The temperature compensating circuit includes a first series path comprising a first cascode current sources and a first resistor; a second series path comprising a second cascode current source, a first field effect transistor and a first diode; and a third series path comprising a third cascode current source, a second field effect transistor, a second resistor and a second diode. The first series path being connected to the second series path between the first field resistor and the first diode. The current produced by the first current source, develops a voltage across the first resistor, which varies at least as a function of the ratio of the first and second resistors, the ratio of the diode junction areas, the dimensions of the first and second field effect transistors, and the first diode thermal voltage which has a positive temperature coefficient. The voltage across the first diode has a negative temperature coefficient. The output voltage taken across both the first resistor and first diode can be made substantially temperature invariant if the resistor ratio is selected such that it amplifies the temperature coefficient of the thermal voltage so that it is substantially equal and opposite to the temperature coefficient of the first diode voltage.
    • 本文提供了一种用于从未调节的电源电压产生调节温度补偿的输出电压的参考电压发生器。 参考电压发生器包括预调节电路和温度补偿电路。 温度补偿电路包括第一串联路径,其包括第一共源共栅电流源和第一电阻器; 第二串联路径,包括第二共源共栅电流源,第一场效应晶体管和第一二极管; 以及包括第三共源共栅电流源,第二场效应晶体管,第二电阻和第二二极管的第三串联路径。 第一串联路径连接到第一场电阻器和第一二极管之间的第二串联路径。 由第一电流源产生的电流产生跨越第一电阻器的电压,其至少与第一和第二电阻器的比率,二极管接合面积的比率,第一和第二场域的尺寸, 效应晶体管,以及具有正温度系数的第一二极管热电压。 第一二极管两端的电压具有负温度系数。 如果选择电阻比使得其放大热电压的温度系数使得其基本上等于并与第一电阻和第一二极管的温度系数相反,则可以使第一电阻器和第一二极管两端的输出电压基本上是温度不变的 二极管电压。