A wideband mixer circuit that is flexible and reconfigurable so that several identical wideband mixer circuits may be used in lieu of several fixed narrow-band mixers. Such wideband mixer circuits can be provided in multiples within a chip such that multiple inputs are each within a wide frequency range (i.e., 3 GHz) and may be actively narrowed to any desired frequency range by way of the operation inherent to the circuit architecture. Such a chip supports multiple standards at each input.