The indicated circuit uses an unusual buffer from National Semiconductor. The frequency is given by resistors R1 and R2 as well as capacitors C1 and C2.
This circuit was found in a 1993 publication. The L1 coil consists of 12 turns in a ferrite core...
January 2017 - Mouser Electronics is introducing new, ultra-thin Vishay Displays OLED modules. The new...
This high-power amplifier that comes close to 400 W peak uses unusual high-power transistors...