FIELD: processing of signals from pickups of knocking combustion. SUBSTANCE: circuit diagram for noise-immune processing of signals allows output signals from pickups to be processed. Each pickup has two inputs. Only one input is needed in each pickup while processing signals with reference potential " ground ". Signals are processed in compliance with differential circuit engineering. Differential processing of signal is carried out with connection to potential " ground " with use of reference voltage generated by circuit diagram itself. Operation condition of such circuit diagram can be easily selected from outside with the aid of controlling lead-out provided in circuit diagram. EFFECT: improved noise immunity of signal processing. 5 cl, 1 dwg
