Patent ID: 6720755
Filing Date: 2004-04-13
Classification: G05F

Abstract:
A band gap reference comprising:a first amplifier having a (+) input, a (âˆ’) input and an output; a first current source having a current control input connected to the output of the first amplifier, the first current source connected to the (+) input of the first amplifier; a first diode connecting the first current source to a ground line; a second current source having a current control input connected to the output of the first amplifier, the second current source connected to the (âˆ’) input of the first amplifier; a first resistor having a first terminal connected to the second current source and the (âˆ’) input of the first amplifier, and having a second terminal; a second diode connecting the second terminal of the first resistor to the ground line; a second resistor; and means for adjusting current based on temperature variations, the means for adjusting being connected to the output of the first amplifier and the second resistor, and providing an output which minimizes current change due to temperature variations by combining the output from the first amplifier with current provided through the second resistor.