Current source circuit

A current source circuit comprising:

• a first voltage node to which a first voltage is supplied;
• a second voltage node to which a second voltage lower than said first voltage is supplied;
• a current mirror circuit including a first transistor of a first polarity having a base, an emitter and a collector, said emitter of said first transistor being coupled to said first voltage node, a second transistor of the first polarity having a base, an emitter and a collector, said emitter of said second transistor being coupled to said first voltage node, said base of said second transistor being connected commonly to the base of said first transistor, a third transistor of the first polarity having a base, an emitter, a collector, said emitter of said third transistor being connected to a base common connection node of said first and second transistors, said base of said third transistor being connected to the collector of said first transistor, said collector of said third transistor being connected to said second voltage node, and a fourth transistor of the first polarity having a base, an emitter and a collector, said emitter of said fourth transistor being coupled to said first voltage node, said base and collector of said fourth transistor being connected to the base common connection node of said first and second transistors, wherein the collectors of said first and second transistors are used as current input and output terminals of said current mirror circuit;
• and
• a correction circuit including a fifth transistor of the first polarity having a base, an emitter and a collector, said emitter of said fifth transistor being coupled to said first voltage node, a sixth transistor of the first polarity having a base, an emitter and a collector, said emitter of said sixth transistor being coupled to said first voltage node, said base of said sixth transistor being connected commonly to the base of said fifth transistor, said collector of said sixth transistor being connected to said second voltage node, a seventh transistor of the first polarity having a base, an emitter and a collector, said emitter of said seventh transistor being coupled to said first voltage note, said base of said seventh transistor being connected to a base common connection node of said fifth and sixth transistors, an eighth transistor of the first polarity having a base, an emitter and a collector, said emitter of said eighth transistor being connected to a base common connection node of said fifth, sixth and seventh transistors, said base of said eighth transistor being connected to the collector of said fifth transistor, said collector of said eighth transistor being connected to the collector of said seventh transistor, and a ninth transistor of a second polarity having a base, an emitter and a collector, said emitter of said ninth transistor being connected to the collector of said eighth transistor, said base of said ninth transistor being connected to the collector of said second transistor, said collector of said ninth transistor being connected to said second voltage node.

A current source circuit comprising:

• a first voltage node to which a first voltage is supplied;
• a second voltage node to which a second voltage lower than said first voltage is supplied;
• a current mirror circuit including a first transistor of a first polarity having a base, an emitter and a collector, said emitter of said first transistor being coupled to said first voltage node, a second transistor of the first polarity having a base, an emitter and a collector, said emitter of said second transistor being coupled to said first voltage node, said base of said second transistor being connected commonly to the base of said first transistor, a third transistor of a second polarity opposite to said first polarity having a base, an emitter and a collector, said collector of said third transistor being connected to a base common connection node of said first and second transistors, a fourth transistor of the first polarity having a base, an emitter and a collector, said emitter of said fourth transistor being connected to the emitter of said third transistor, said base of said fourth transistor being connected to said collector of said first transistor, said collector of said fourth transistor being connected to said second voltage node, and a fifth transistor of the first polarity having a base, an emitter and a collector, said emitter of said fifth transistor being coupled to said first voltage node, said base and collector of said fifth transistor being connected to the base common connection node of said first and second transistors, wherein the collectors of said first and second transistors are used as current input and output terminals of said current mirror circuit;
• and
• a correction circuit including a sixth transistor of the first polarity having a base, an emitter and a collector, said emitter of said sixth transistor being coupled to said first voltage node, a seventh transistor of the first polarity having a base, an emitter and a collector, said emitter of said seventh transistor being coupled to said first voltage node, said base of said seventh transistor being connected commonly to the base of said sixth transistor, said collector of said seventh transistor being connected to said second voltage node, an eighth transistor of the first polarity having a base, an emitter and a collector, said emitter of said eighth transistor being coupled to said first voltage node, said base of said eighth transistor being connected to a base common connection node of said sixth and seventh transistors, said collector of said eighth transistor being connected to the base of said third transistor, a ninth transistor of the first polarity having a base, an emitter and a collector, said emitter of said ninth transistor being connected to a base common connection node of said sixth, seventh and eighth transistors, said base of said ninth transistor being connected to the collector of said sixth transistor, a tenth transistor of the first polarity having a base, an emitter and a collector, said emitter of said tenth transistor being connected to the collector of said ninth transistor, said base of said tenth transistor being connected to the collector of said second transistor, said collector of said tenth transistor being connected to said second voltage node, and an eleventh transistor of the second polarity having a base, an emitter and a collector, said base and collector of said eleventh transistor being connected to the base of said third transistor, said emitter of said eleventh transistor being connected to the emitter of said tenth transistor.