A system and method is disclosed for providing a bandgap reference voltage
generator that can successfully operate with a low operating voltage.
Three current sources are controlled to provide same amount of current
through three paths. The first current source is used to enable a first
negative temperature coefficient module, while the second and third
current sources are used to enable a first positive temperature
coefficient module. The three current sources together are used to enable
a reference voltage output module, which is connected to a current
summing module for producing a bandgap reference voltage independent of
temperature variations.