Patent ID: 7853233

Claim:
A zero IF down converter circuit, comprising: a voltage-to-current converter to convert an RF voltage signal to an RF current signal; a mixer to change a frequency of the current signal to a lower frequency current signal; and a suppression circuit to remove a lower frequency distortion component from the RF current signal before sending the RF current signal to the mixer; wherein: the voltage-to-current converter comprises a first field effect transistor (FET) comprising a gate, a drain, and a source, a first inductor comprising a first end coupled to the source of the first FET and a second end, and a first input for receiving the RF voltage signal, the first input being coupled to the source of the first FET; and the suppression circuit comprises a first bypass capacitor coupled between the second end of the first inductor and a reference node, a first suppression circuit FET coupled between the second end of the first inductor and the reference node, and a second suppression circuit FET, wherein a gate of the first suppression circuit FET is coupled to a gate of the second suppression circuit FET.