power_pwer
Junior Member level 1
hello,everyone,
i am designing a bandgap reference on the HHNEC process which offer me three kinds of resistros,rdiff,rnwell and rpoly.my topology of BGR is a classical one(PTAT+bipolar).the circuit generate 1.245V when rpoly is used,but 1.27V when rnwell is used,i think 1.245V is reasonable ,but why is it 1.27V when rnwell is used ?
PS:i also get 1.245V when i use ideal resistor to simulate
i am designing a bandgap reference on the HHNEC process which offer me three kinds of resistros,rdiff,rnwell and rpoly.my topology of BGR is a classical one(PTAT+bipolar).the circuit generate 1.245V when rpoly is used,but 1.27V when rnwell is used,i think 1.245V is reasonable ,but why is it 1.27V when rnwell is used ?
PS:i also get 1.245V when i use ideal resistor to simulate