ccheng
Newbie level 2
analog design problem
when i used a constant gm circuit , i need a resistor to generate the biasing current . But , in the practical , the resistor has a big variation in the ic . so i can not get the same current from die to die .
Can anyone tell me , how to solve this problem ?
Or is there any other circuit have the same funcation ?
ps. there is no external pin for the resistor.![Crying :cry: :cry:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
when i used a constant gm circuit , i need a resistor to generate the biasing current . But , in the practical , the resistor has a big variation in the ic . so i can not get the same current from die to die .
Can anyone tell me , how to solve this problem ?
Or is there any other circuit have the same funcation ?
ps. there is no external pin for the resistor.