Apparatus and methods concern down-converting a radio frequency (RF) signal. As an example, one apparatus includes a first mixer and a second mixer. The first mixer down-converts an RF signal to produce a first intermediate frequency (IF) signal. The second mixer down-converts the first IF signal to produce a second IF signal having a plurality of phase components. The down-converter also includes a plurality of summing circuits. Each of the summing circuits is configured to combine various ones of the phase components of the second IF signal to produce a respective phase component of a third IF signal. The number of phase components in the third IF signal is different from the number of phase components in the second IF signal.