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1. 发明授权

US5686822A Method of making a reference current generator 失效
标题翻译：制作参考电流发生器的方法
公开(公告)号：US5686822A
公开(公告)日：1997-11-11
申请号：US640108
申请日：1996-04-30
申请人： Gregg Douglas Croft , Sang-Gug Lee , Steven Robert Jost
发明人： Gregg Douglas Croft , Sang-Gug Lee , Steven Robert Jost
IPC分类号： G05F3/26 , G05F1/10
CPC分类号： G05F3/265
摘要： A current generator and method of making a current generator in which two resistors are provided, each in series with one of two transistors in the generator, and in which one of the resistors is trimmed if the reference current is too large and the other is trimmed if the reference current is too small, thereby obviating the problems of the prior art in which one resistor must be trimmed by a potentially large and unacceptable amount. The two resistors are formed with a distribution of resistances which is centered on their corresponding target resistance values so that the number of resistors to be trimmed and the amount of trimming per resistor are reduced. The appropriate target resistances of the resistors can be determined if a maximum trim factor is set. The method is insensitive to variations in the process by which the resistances of the resistors are initially set and reduces the variability of the untrimmed reference current with respect to resistor critical dimensions.
摘要翻译：一种电流发生器和制造电流发生器的方法，其中设置有两个电阻器，每个电阻器与发生器中的两个晶体管中的一个串联，并且如果参考电流太大而另一个被修整，则电阻器中的一个被修整如果参考电流太小，从而避免了现有技术的问题，其中一个电阻器必须用可能大的和不可接受的量来修整。两个电阻器形成有以其对应的目标电阻值为中心的电阻分布，使得要修整的电阻器的数量和每个电阻器的修整量减少。如果设置了最大微调因子，则可以确定电阻器的适当目标电阻。该方法对于最初设置电阻器的电阻的过程中的变化不敏感，并且减小未匹配参考电流相对于电阻器关键尺寸的可变性。

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