Patent ID: 7233204
Filing Date: 2007-06-19
Classification: H03F

Abstract:
1. A transconductor comprising: a first transconductor circuit that includes a first MOS transistor operating in a triode region by an input voltage input through a gate electrode, a first resistor unit connected to the first MOS transistor, a third MOS transistor connected to the first resistor unit, and a first current source connected to the third MOS transistor; and a second transconductor circuit that includes a second MOS transistor operating in the triode region by an input voltage input through a gate electrode, a second resistor unit connected to the second MOS transistor, a fourth MOS transistor connected to the second resistor unit, and a second current source connected to the fourth MOS transistor, wherein a resistance value of the first resistor unit and the second resistor unit are chosen such that a sum of transconductances of the first transconductor circuit and the second transconductor circuit is substantially constant for a range of input voltage values.