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公开(公告)号:EP0925534B1
公开(公告)日:2001-03-28
申请号:EP97940782.2
申请日:1997-09-04
CPC分类号: G05F3/242 , H03H11/245
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公开(公告)号:EP0925534A1
公开(公告)日:1999-06-30
申请号:EP97940782.0
申请日:1997-09-04
CPC分类号: G05F3/242 , H03H11/245
摘要: A control circuit is provided that can be used to compensate for pinch off voltage sensitive circuits. The control circuit comprises a control FET (26) having a gate (27), a drain (29), and a source (28). The control FET source (28) is connected to a tracking potential (23) through control FET source resistor (31) in series with a constant voltage drop element (32). A control voltage input (22) is applied to the control FET drain (29). A current flow through the control FET (26) results in a transfer function that is substantially linear for linear changes in control voltage input below a voltage pinch off value of the control FET (26). As the voltage control output (23) approaches the pinch off voltage value of the control FET (26), smaller changes in control voltage output (23) are realized for the same change in control voltage input (22).
摘要翻译: 提供了一个控制电路,可以用来补偿夹断电压敏感电路。 控制电路包括具有栅极(27),漏极(29)和源极(28)的控制FET(26)。 控制FET源28通过控制FET源电阻31与恒压降元件32串联连接到跟踪电位23。 控制电压输入(22)被施加到控制FET漏极(29)。 流过控制FET(26)的电流导致对于控制电压输入的线性变化在控制FET(26)的电压夹断值以下基本为线性的传递函数。 当电压控制输出(23)接近控制FET(26)的夹断电压值时,对于控制电压输入(22)中的相同改变实现控制电压输出(23)中的较小改变。
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