This question is about single-balanced mixers vs double-balanced mixers (MOS transistor mixers):

1) Which has more conversion gain and why?
2) Which has better IP3 and why?
3) Say both is at a certain RF freq.  With LO freq at a slightly lower freq.  What would be the effect (on conversion gain and IP3) of decreasing the LO freq even more?
4) An added source inductance would have what effect on the conversion gain and IP3 for both?