The operational amplifier and the sensor used in this National Semiconductor circuit are not common today, but the configuration can be adapted to use current components.
The filter shown in the figure, suggested by Motorola, operates at a cut-off frequency of 1 kHz,...
The purpose of this circuit based on Maxim's MAX9022 is to find faults in multiple cables. The...
This circuit is suggested by Motorola in its 1990 Linear Databook. The speaker (or headphone is 32...