Patent ID: 9092044
Filing Date: 2015-07-28
Classification: G05F

Abstract:
1. A bandgap voltage generating circuit for generating a bandgap voltage, said circuit comprising: an operational amplifier having two inputs and an output; a current mirror circuit having at least two parallel current paths, each of said current paths controlled by a signal from said output of said operational amplifier; one of said current paths comprising two parallel subpaths with each subpath connected to a different one of the two inputs of the operational amplifier; a resistor divide circuit connected to another of said current paths, said resistor divide circuit providing said bandgap voltage; wherein one of the subpaths has a resistor connected in the subpath; wherein each current path comprises a PMOS transistor controlling current between a source and a drain of the PMOS transistor with its gate coupled to the output of the operational amplifier and a bipolar transistor having an emitter/collector connected in series with the source/drain of the PMOS transistor; wherein each of the subpaths has a current source; wherein the current source in each subpath comprises a PMOS transistor and a native MOS transistor connected in parallel.