Patent ID: 7994849

Claim:
A voltage reference generator, comprising: a bandgap voltage reference circuit including: a first divider network configured to generate a first divider network voltage; a second divider network including a diode array and configured to generate a second divider network voltage, the second divider voltage being a first complementary-to-absolute-temperature (CTAT) signal; and a differential amplifier operably coupled with the first divider network and the second divider network, and configured to generate a second CTAT signal in response to receiving the first divider network voltage and the second divider network voltage as inputs; and a differential sensing device operably coupled with the bandgap voltage reference circuit, the differential sensing device including the first CTAT signal operably coupled with an inverting input of the differential sensing device, and the second CTAT signal operably coupled with a non-inverting input of the differential sensing device, wherein the differential sensing device is furthered configured to generate a positive reference signal substantially insensitive to temperature variations over an operating temperature range in response to the first CTAT signal and the second CTAT signal, wherein the positive reference signal is relatively closer, during an offset condition of the first divider network voltage and the second divider network voltage, to an ideal output of the positive reference signal than is a voltage difference between the second CTAT signal and the first divider network voltage, the ideal output being the positive reference signal when the first divider network voltage and the second divider network voltage are equal.