EXAMINE THIS REPORT ON PIN DIODE SWITCH

It really is LM108 and LM112 (internally compensated) and there is really no trick there. It's got 1nA input bias that's quite stable with temperature as in the majority of bipolar opamps since β really increases with temperature. Later on iterations like LT1008/LT1012 or OP97 pushed it all the way down toPurchase of a completely new transceiver,