Transconductor tuning circuit

A transconductor tuning circuit for controlling transconductance of a transconductor, the tuning circuit comprising:

• a first MOS (Metal-Oxide Semiconductor) transistor, a source terminal of said first MOS transistor being connected to a power source, a gate terminal and a drain terminal of the first MOS transistor being connected to each other;
• a second MOS transistor, a source terminal of said second MOS transistor being connected to the power source, a gate terminal and a drain terminal of the second MOS transistor being connected;
• and
• a first error amplifier, a first input terminal of the first error amplifier being connected to the gate terminal of the first MOS transistors, a second input terminal of the first error amplifier being connected to the gate terminal of the second MOS transistor,
• wherein the first error amplifier outputs an output signal in form of a bias signal for controlling tuning of the transconductor.