Patent ID: 6507180
Filing Date: 2003-01-14
Classification: G05F

Abstract:
A bandgap reference circuit comprising:a first serial circuit comprising a first diode, a first transistor and a first resistor serially connected together; a second serial circuit comprising a second diode having a greater current feed area than said first diode, a second transistor and a second resistor serially connected together; an amplifier for amplifying a difference between a voltage drop of said first resistor and a voltage drop of second resistor; and a third serial circuit comprising a third transistor control led by an output of said amplifier, a third resistor, a fourth resistor and a third diode serially connected together; wherein opposite ends of said fourth resistor are respectively connected to a gate of said first transistor and a gate of said second transistor, and a reference voltage appears on opposite ends of a portion of said third serial circuit including said third resistor, said fourth resistor and said third diode.