This 10 kHz filter was obtained from an article in Electronics Now magazine in February 1995. The power supply is dual and other equivalent operating conditions can be used.
We have here a very interesting project found in a 1982 publication. By the operation of the...
We found this circuit in an old American manual. The formulas allow the gain to be calculated as a...
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...