Patent ID: 6411158
Filing Date: 2002-06-25
Classification: G05F

Abstract:
A bandgap reference voltage circuit, comprising:an operational amplifier having a first input node, a second input node, and an output node configured to output a reference voltage; a first transistor configured for electrical communication with said first input node and having a first resistive element configured for electrical communication with and in series between said first transistor and said first input node, said first resistive element having a resistance value greater than an impedance of said first transistor; a second transistor configured for electrical communication with said second input node and having a second resistive element configured for electrical communication with and in series between said second transistor and said second input node, said second resistive element having a resistance value greater than an impedance of said second transistor; and a feedback loop configured to feed said reference voltage back to said first input node through a third resistive element, and wherein the parallel combination of said first resistive element and said third resistive element is large compared to the impedance of said first transistor.