Patent ID: 8786271
Filing Date: 2014-07-22
Classification: G05F

Abstract:
1. A circuit for generating a reference voltage and a reference current, comprising: a band-gap reference circuit, configured to generate a temperature-independent reference voltage by generating a first current with a positive temperature coefficient; and a voltage-to-current converting circuit, coupled to a node of the band-gap reference circuit and configured to convert a voltage with a negative temperature coefficient at the node into a second current with a negative temperature coefficient; wherein the band-gap reference circuit and the voltage-to-current converting circuit share a common current source and the common current source has a feedback transistor through which a reference current flows; wherein the reference current is divided into the first current of the band-gap reference circuit and the second current of the voltage-to-current converting circuit, having a temperature coefficient substantially equal to zero by combining the first current and the second current; wherein the voltage-to-current converting circuit comprises: