This filter was found in Exar documentation from the 1980s. The circuit has an attenuation of 60 dB at the selected frequency. The power supply must be symmetrical.
This oscillator works with voltages from 1 V of alternative energy sources, such as a battery of...
This timer for long time intervals is from the 1990 Motorola Linear Databook. The setting applies...
Also suitable for use as a noisy alarm, this Morse Code or telegraph practice oscillator was found...