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    • 2. 发明授权
    • Threshold voltage fluctuation compensation circuit for FETS
    • FETS的阈值电压波动补偿电路
    • US4857769A
    • 1989-08-15
    • US143385
    • 1988-01-13
    • Nobuo KoteraKiichi YamashitaTaizo KinoshitaHirotoshi TanakaSatoshi TanakaMinoru Nagata
    • Nobuo KoteraKiichi YamashitaTaizo KinoshitaHirotoshi TanakaSatoshi TanakaMinoru Nagata
    • H03K19/003
    • H03K19/00384
    • This invention relates to a threshold voltage detection circuit for detecting the threshold voltage of field effect transistors (FETs) and to a semiconductor circuit capable of a stable operation irrespective of the fluctuation of the threshold voltage by utilizing this threshold voltage detection circuit. The source-drain path of first FET is connected in series with that of second FET having substantially the same threshold voltage as that of the first FET and the conductances of these first and second FETs are set to a predetermined ratio to generate a voltage drop associated with the threshold voltage in the first FET. This voltage drop can be used for detecting the threshold voltage and for level-shifting. The output of the series connection of the first and second FETs is applied to the gate of a constant current FET having the same threshold voltage as that of the first and second FETs and the drain current of the constant current FET can thus be set irrespective of the fluctuation of the threshold voltage.
    • 本发明涉及一种阈值电压检测电路,用于通过利用该阈值电压检测电路来检测场效应晶体管(FET)的阈值电压和能够稳定工作的半导体电路,而与阈值电压的波动无关。 第一FET的源极 - 漏极路径与具有与第一FET基本相同的阈值电压的第二FET的源极 - 漏极路径串联连接,并且将这些第一和第二FET的电导设置为预定的比率以产生相关的电压降 与第一FET中的阈值电压。 该电压降可用于检测阈值电压和电平转换。 第一和第二FET的串联连接的输出被施加到具有与第一和第二FET相同的阈值电压的恒流FET的栅极,因此可以设定恒定电流FET的漏极电流,而不管 阈值电压的波动。