Patent ID: 7411380
Filing Date: 2008-08-12
Classification: G05F,Y10S

Abstract:
1. A bandgap reference circuit, comprising: a PTAT current unit, generating a PTAT current and summing a non-linear current; a first transistor, biased by the PTAT current output from the PTAT current unit; a second transistor, biased by the PTAT current output from the PTAT current unit; an amplifier and voltage divider circuit, for outputting a reference voltage in response to a base-emitter voltage, a PTAT voltage, and a non-linear voltage; and a non-linearity compensation circuit, for converting the reference voltage as a temperature independent bias current, wherein the non-linearity compensation circuit comprises: wherein the non-linear effect and the temperature dependent effect of the reference voltage are compensated by the non-linearity compensation circuit.