Patent ID: 6348835
Filing Date: 2002-02-19
Classification: G05F

Abstract:
A semiconductor device with a constant current source circuit comprising:a current mirror circuit including first and second transistors, connected to a line of a power supply potential, and respectively supplying first and second currents; third and fourth transistors, each of which has a control electrode and first and second electrodes, and said control electrode is operatively coupled to a first potential, wherein said first electrode and said control electrode in said third transistor are connected to a first node, said control electrode of said fourth transistor is connected to said first node, and said third and fourth transistors receive said first and second currents at said first electrodes from said current mirror circuit, respectively; a first resistor connected between said second electrode of said fourth transistor and a second node; and a potential change transferring section connected to a second potential and said second node such that a change of potential difference between said first potential and said second potential is transferred to said second electrodes of said third and fourth transistors.