Patent ID: 8907650

Claim:
A temperature adaptive bandgap reference circuit, comprising a bandgap voltage reference including an output module, an adjustment module and a resistor network, the resistor network connected with the output module, the resistor network having two branches connected to ground by a first bipolar transistor and the second bipolar transistor, respectively, the adjustment module sampling a voltage of the two branches to adjust an output voltage of the output module, the adjustment module including a sample and hold circuit, a voltage comparator and a control module, the sample and hold circuit having an input connected with the output voltage of the output module, the sample and hold circuit having an output connected to an input of the voltage comparator, the voltage comparator having an output connected with an input of the control module the control module having an output connected with the resistor network wherein according to the output of the voltage comparator, the resistance of the resistor network is changed and the output voltage of the output module is changed, and finding the resistance of the resistor network when the output voltage reaches a maximum value results in the output voltage of the output module being a maximum voltage.