CIRCUIT ARRANGEMENT FOR COMPENSATING PARASITIC SIGNALS IN THE CLOSED LOOP OF A LINEAR LAMBDA PROBE.

摘要

In a known circuit arrangement, a compensation circuit (KS) is provided between the output of the differential amplifier (Diff_Amp) and the input of the controller (R). Said compensation circuit generates a compensation signal, whose characteristic curve approximates to that of the parasitic signal, with the same amplitude and frequency (Phi1) as the parasitic signal, but by 180 out of phase. Said compensation signal is subtracted from the differential signal (Dgr;Vs) and allows the parasitic signal to be eliminated to a great extent.