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.
Found in a 1964 Electronic Design, this circuit is intended to serve as a time base for cardiac...
In high voltage sources, it is recommended to quickly discharge the filter capacitors to avoid...
This circuit is a version of the previous one, but with full wave control. The diodes must be...