Patent ID: 7906993

Claim:
A high linearity voltage-current converter able to compensate for mobility degradation, comprising: a first constant current source circuit including a first MOS (Metal Oxide Semiconductor) transistor having a gate, a first terminal and a second terminal; a first current mirror unit including a second MOS transistor and a third MOS transistor each having a gate, a source and a drain, wherein said second MOS transistor is coupled to said first constant current source circuit via said drain thereof; an amplifier including an output terminal, an inverted phase input terminal and a non-inverted phase input terminal, wherein said output terminal of said amplifier is coupled to said gates of said second and said third MOS transistors at a first joint point, and wherein said inverted phase input terminal of said amplifier is coupled to a second joint point of said first constant current source circuit; a second current mirror unit including a fifth MOS transistor and a sixth MOS transistor each having a gate, a source and a drain, wherein said drain of said fifth MOS transistor is coupled to said drain of said third MOS transistor at a third joint point; a second constant current source circuit coupled to said drain of said sixth MOS transistor; a seventh MOS transistor including a gate, a first terminal and a second terminal, wherein said first terminal of said seventh MOS transistor is coupled to said third joint point via a first conducting wire; and an eighth MOS transistor including a gate, a first terminal and a second terminal, wherein said first terminal of said eighth MOS transistor is coupled to a current output unit, and wherein said gate of said eighth MOS transistor is coupled to said gate of said seventh MOS transistor.