Re: Body effect
I think the BJT body effect you're talking about is called the Early effect, thats the increase in the collector current after saturation due to the widening of the collector-base junction causing the width of the base to increase.
The body effect in the FETs as I recall is the variation of the threshold voltage with the variation of the body (substrate) voltage. We get over this by simply connecting the source and the bulk together. This is different than the channel length modulation that occurs mainly in short channel devices due to variation of the effective channel length significantly at voltages > VDSsat which gives similar results as that of the Early effect in BJT