chemaphy
Junior Member level 2
npn current mirror
Hello all, I am now designing a differential resistor ladder that has a top current source and a bottom current source. The current that flows through the resistor ladder is 15mA. I know that for the bottom current source, I can use NPN BJT to generate the current. I also know that I could have used PNP BJT to generate the current source. But since I don't have PNP BJT nor PMOS in my technology, I don't know how to generate the "pull down" current. Can anyone please give me some advice on solving the problem?
Thanks,
chemaphy
Hello all, I am now designing a differential resistor ladder that has a top current source and a bottom current source. The current that flows through the resistor ladder is 15mA. I know that for the bottom current source, I can use NPN BJT to generate the current. I also know that I could have used PNP BJT to generate the current source. But since I don't have PNP BJT nor PMOS in my technology, I don't know how to generate the "pull down" current. Can anyone please give me some advice on solving the problem?
Thanks,
chemaphy