Patent ID: 9141125
Filing Date: 2015-09-22
Classification: G05F

Abstract:
1. A bandgap reference voltage generating circuit, used for providing a reference voltage, the bandgap reference voltage generating circuit, comprising: a four-terminal current source circuit, electrically connected to a first system voltage, wherein when the first system voltage is larger than a threshold voltage value, a first voltage, a second voltage and a first current outputted from the four-terminal current source circuit are independent of variation of the first system voltage; a regulator circuit, electrically connected to the four-terminal current source circuit, wherein when the regulator circuit receives the first voltage and the second voltage, and when the first system voltage is larger than the threshold voltage value, the reference voltage outputted from the regulator circuit is independent of variation of the first system voltage via voltage difference steadily between the first voltage and the second voltage; and a temperature-compensating circuit, electrically connected to the four-terminal current source circuit and the regulator circuit, wherein the temperature-compensating circuit receives the first current and compensates a temperature curve of the reference voltage outputted from the regulator circuit.