Schmitt Trigger with NPN Transistors extreme hysteresis rail to rail

211

02:15:06

Schmitt Trigger with NPN Transistors

published 5 years ago

slm67

5 years ago

Sorry but this is not a Schmidt trigger. Missing hysteresis.

Chasyxx

5 years ago

I don't think Schmidt triggers turn on at the same level than turning off. It's normally that it needs a higher voltage to turn on than off.

loloh

5 years ago

The hysteresis is indeed very small and can be increased by rising the 200 ohm resistor. But this increases also the low level of output signal

loloh

5 years ago

The initial circuit consists of only the leftmost 2 transistors. And the origin emitter resistor had 200 ohms only. After increasing this resistor and adding two more transistors the hysteresis and also the output voltage swing became extreme.

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