Figure 2 Schematic diagram of wire break detector using CMOS memory cell (shown in broken box). If using the CD40106, only one gate is needed for the oscillator (Schmitt inputs). An additional gate ...

and the basic logic gates, including OR, AND and XOR, are realised with ideal high and low logic states. By incorporating a CMOS inverter with a gain much greater than one in the PTL circuits, PTL ...

[IMSAI Guy] grabbed an obsolete XOR gate and tried a classic circuit to turn it into a frequency ... In all fairness, the original schematic used a Schmitt trigger gate, which may have made ...