Diode-connected V350 which acts as a zener diode for negative vol.ages ~— R304 and the gate-drain junction of V302 for positive voltages. . Forthe input rangefrom —1V to+1V on thegateof V302, the outputatV305 collectorliesbetween OV and 2V; i.e. it is always positive. : I M P E DC O N V E R T O R (TRIGGER LEVEL