Similar to other circuits found in this section, this circuit is from a 1996 Electronics World; FET is general-purpose and the output circuit must be resonant at 100 kHz.
This circuit emits a sound at regular intervals to prevent you from falling asleep, for example. It...
November 2016 - Texas Instruments' new TLV8802 nano-power operational amplifiers for wireless...
The circuit presented is from 1994 and can be implemented with more modern equivalent components. We...