Patent ID: 6031365
Filing Date: 2000-02-29
Classification: G05F

Abstract:
A band gap reference comprising:an operational amplifier (opamp) having a (+) input, a (-) input, and an output;a first diode having a first terminal coupled to V.sub.SS, and a second terminal coupled to the (+) input of the opamp;a first current source transistor having a source to drain path coupling V.sub.DD to the second terminal of the first diode, and a gate coupled to the output of the opamp;a second diode having a first terminal coupled to V.sub.SS, and a second terminal;a first resistor having a first terminal coupled to the second terminal of the second diode, and a second terminal coupled to the (-) input of the opamp;a second current source transistor having a source to drain path coupling V.sub.DD to the second terminal of the first resistor, and a gate coupled to the output of the opamp;a third diode having a first terminal coupled to V.sub.SS, and a second terminal;a second resistor having a first terminal coupled to the second terminal of the third diode, and a second terminal providing the output of the band gap reference; anda third current source transistor having a source to drain path coupling V.sub.DD to the second terminal of the second resistor, and a gate coupled to the output of the opamp.