Voltage generating circuit, voltage reference circuit, and method for operating the same

Abstract

A voltage reference circuit is provided, which includes a first voltage source and a second voltage source. The first voltage source is configured to generate a first voltage which monotonically decreases with an absolute temperature of the voltage reference circuit. The second voltage source is configured to generate a second voltage, which monotonically increases with the absolute temperature of the voltage reference circuit. The second voltage is compensated with the first voltage to generate a reference voltage. The first voltage source includes a first temperature-sensitive device and a second temperature-sensitive device. The first temperature-sensitive device is of a first type, and the second temperature-sensitive device is of a second type. These devices are arranged in a cascode structure. The first voltage at an output terminal of the first voltage source equals to a third voltage across the first temperature-sensitive device plus a fourth voltage across the second temperature-sensitive device.

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