Patent ID: 6931605

Claim:
A current conveyor circuit capable of operating at very low voltages, said current conveyor circuit comprising: a port X for providing an input current; a port Y for providing an input voltage; a first low voltage current mirror (LVCM), LVCM 1 , having a first output port coupled to the port X and a second output port coupled to an output port Z; a voltage buffer (VB) circuit, coupled between the port X and the port Y; a second LVCM, LVCM 2 , coupled to the VB circuit, for maintaining constant drain currents of the VB circuit; a third LVCM, LVCM 3 , coupled to the VB circuit, for maintaining a constant tail current in the VB circuit; A third MOSFET M 3 , and a fourth MOSFET, M 4 , respectively, with gates coupled together and further coupled to an output port of LVCM 2 ; a reference voltage provided to sources of M 3 and M 4 , respectively; a third MOSFET M 3 drain coupled to the part X and the first output port of LVCM 1 , LVCM 1 providing a constant bias current to flow through M 3 ; and a fourth MOSFET M 4 drain coupled to the output port Z and the second output port of LVCM 1 .