This 300 Hz to 3.4 kHz filter was found in the May 1989 Radio Electronics magazine. The circuit requires a symmetrical power supply.
This circuit for cars with fans was found in Silicon Chips documentation from the 90s. It is used...
This digital die circuit was found in an old European publication. The circuit is still viable due to...
This circuit that also has a Power On reset was obtained from a 2005 Linear Technology manual. The...