With the configuration shown, the output capacity of the LM12 can be doubled, which is 4 A. The circuit is from the Linear Applications Handbook of the National Semiconductor of 1994.
Other operational amplifiers in the series, such as the MC34072, MC34074, MC35071, MC35072,...
This circuit is from an old RCA MOSFET manual from the 70s. The circuit can be implemented with...