Found in an Electronic Design from the 90s, this circuit uses high voltage operationals of the time to excite a piezoelectric motor in a bridge circuit.
This oscillator can generate signals from 100 kHz to more than 50 MHz depending on the crystal used...
Suggested by Texas Instruments in 1968 documentation, this circuit uses components from the era....
This inverter is critical for transformers and can use modern equivalent transistors like MJ2955 on...