This paper describes a new wideband-enabling frequency converter topology based on N-path circuits. A model of the N-path frequency converter, derived from the N-path theory, is proposed. It can predict both conversion gains and the output spectrum, and explain unwanted harmonics as well. The operating principle is validated by an integrated circuit (IC) fabricated in 130nm BiCMOS technology, exhibiting a minimum 185-MHz bandwidth over a 0.5-1.5 GHz clock frequency range.
