Patent ID: 6191644
Filing Date: 2001-02-20
Classification: G05F

Abstract:
A voltage reference circuit, comprising:a current mirror, comprising:a first conduction leg having a plurality of transistors with current paths connected in series between a power supply voltage and a reference voltage, the first conduction leg having a first transistor with a control electrode connected to a startup node; andan output leg having a plurality of transistors having current paths connected in parallel with said plurality of transistors of said first conduction leg, and having an output node at which an output voltage is generated;a first startup transistor, having a conduction path coupled on one side to the power supply voltage and connected on another side to the startup node, and having a control electrode;a capacitor, having a first plate connected to the control electrode of the first startup transistor, and having a second plate biased to the reference voltage; anda discharge transistor having a current path connected in parallel to the capacitor, for discharging the capacitor upon power-down of the power supply voltage.