Patent ID: 6518832
Filing Date: 2003-02-11
Classification: G05F

Abstract:
A current mirror circuit comprising:an input port adapted to receive an input current; an output port adapted to provide an output current therefrom: a first polarity current mirror input transistor having an input electrode coupled to said input port, an output electrode coupled to a power supply terminal, and a control electrode coupled to a control electrode of a first polarity current mirror output transistor, which is operative to supply said output current to said output port in accordance with said input current; a first polarity compensation transistor having an input electrode coupled to control electrodes of said current mirror input and output transistors, an output electrode coupled to a reference voltage terminal, and a control electrode coupled to an output electrode of a second polarity compensation transistor, said second polarity compensation transistor having an input electrode coupled to said power supply terminal and a control electrode coupled to said input electrode of said first polarity current mirror input transistor; and an auxiliary turn-on circuit coupled to said first and second polarity compensation transistors, said auxiliary turn-on circuit including two second polarity transistors respectively coupled between said reference voltage terminal and said first and second polarity compensation transistors.