This circuit uses components of the time. We found it in a 1968 US documentation. The delay is 100 ns and the input impedance is 1 k.
Reversing the switching action, with the output going high when the input is low, can be done by...
September 2017 - Vishay Siliconix SQ MOSFETs for automotive use are in stock for immediate...
This very low Power oscillator uses a neon lamp as active element. Frequency is given by C1 and...