Found elsewhere in this section, this circuit mimics the noise of a steam locomotive. This was obtained from an Electronics Today International of the 1980s.
This low noise microphone preamplifier circuit was found in American documentation from the 90s....
This high input impedance circuit is suggested by Motorola's 1993 Linear Interface ICs. The power...
This circuit was found in a 1989 documentation. The output must be applied to a power step for...