Schmitt trigger for use in electronic circuit, has latch with middle point between supply terminal and output, and negative feedback acting on middle point to fix one of thresholds according to supply potential

摘要

The trigger has a latch with four transistors, where latch has two thresholds, and an input (IN) and an output (OUT) for forming an input and an output of the trigger. The latch also has a middle point between a supply terminal and an output of the latch. A negative feedback acts on the middle point to fix one of the thresholds according to supply potential. One threshold is a function of a stable reference potential.