Signal processing method and an evaluation circuit

A method for the processing of a received signal of an optoelectronic sensor, in particular of a light grid, characterized in that the received signal is supplied with delays which differ from one another and with direct components which differ from one another to the two inputs of a comparator circuit (2);

• and in that the comparator circuit (2) transmits a detection signal which indicates when the one signal applied to the comparator circuit (2) is larger than the other.

A method in accordance with claim 1, characterized in that the individual pulses of the received signal are substantially sinusoidal.

A method in accordance with claim 3, characterized in that the output signal of a difference amplifier, to which a differential signal produced by the optoelectronic sensor is applied, is used as the received signal.

An evaluation circuit for the processing of a received signal of an optoelectronic sensor, in particular of a light bid, characterized in that the received signal is applied via a first and a second signal branch to a respective input of a comparator (2), wherein at least one signal branch has a delay circuit (3;

• 5, 6) which causes the received signal to be applied to the two inputs of the comparator (2) with delays different from one another;
• and wherein at least one signal branch has an offset circuit (4;
• 6) which causes the received signal to be applied to the two inputs of the comparator (2) with direct components which differ from one another, the output signal of the comparator acting on a further processing circuit.

(canceled)