FOXBORO P0970BC-DNBI Analog input module

This voltage difference effectively appears in the signal transfer loop in series with the signal generator and produces noise currents in the load. a. Noise current reduction. Four ways of combating this noise problem are as follows. (1) Isolate the source-load pair from the noise sources; i.e., float the system and provide the necessary shielding and filtering to prevent coupling by other means. (2) Connect the return or low side of the generator-load loop to one of the reference planes, but not at both. (3) Reduce the impedance of the path connecting the two noise sources (the generator and the load).

FOXBORO P0970BC-DNBI Analog input module

Reduce the magnitudes of noise voltages through the control of the currents producing them by lowering the impedance through which these currents flow. b. Common reference plane. Practical electronics circuits typically are a collection of several sourceload combinations. These various source-load combinations may be functionally dependent on each other. Hence each individual source-load pair cannot operate in isolation; there must be coupling between pairs. For example, one source may be driving several loads;

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