Question
Member level 5
bias dac
After finished a DAC design, I found that the bandgap output voltage can not bias DAC directly. So I need a current mirror circuit to bias the current source array in DAC (current steering architecture) . This circuit can change the bandgap output voltage to current. A paper tell me this kind of bias method is more steady than voltage bias.
But, I can not find any paper or book of how to design this kind of circuit.
Please give me some help of design this bias circuit. I have a bandgap, just need a circuit can convert voltage to current.
Thanks.
After finished a DAC design, I found that the bandgap output voltage can not bias DAC directly. So I need a current mirror circuit to bias the current source array in DAC (current steering architecture) . This circuit can change the bandgap output voltage to current. A paper tell me this kind of bias method is more steady than voltage bias.
But, I can not find any paper or book of how to design this kind of circuit.
Please give me some help of design this bias circuit. I have a bandgap, just need a circuit can convert voltage to current.
Thanks.
