Patent ID: 7612606

Claim:
A bandgap reference circuit comprising: a. a first amplifier having an inverting terminal, a non-inverting terminal and an output terminal, b. a second amplifier having an inverting terminal, a non-inverting terminal and an output terminal, c. first and second bipolar transistors operable at different current densities and coupled to the non-inverting and inverting terminals of the first amplifier respectively so as to generate a PTAT current across a first load device coupled to the non-inverting terminal of the first amplifier, d. first and second MOS devices driven by the output of the first amplifier for providing a PTAT current, each MOS device being associated with a corresponding input terminal of the second amplifier, e. a second load device, and wherein the second amplifier is operably coupled to the first amplifier such that the first and second amplifiers share a common node to which a CTAT voltage is applied, the circuit being configured to operably replicate the CTAT voltage across the second load device for generating a CTAT current, the circuit additionally providing a summing node operably coupled to effect a summing of the CTAT and PTAT currents to provide a current output signal.