Switching Circuits Using Bipolar Transistors

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The Transistor as a Switch

The Transistor as a Switch

Explain the operation of a transistor used as a switch.

The Schmitt Triggers

As shown in Figure 1, the electronic symbol for a Schmitt trigger is a triangle with a curved image inside.  This curved image is actually the symbol for hysteresis.

   

Figure .  Symbol for a Schmitt Trigger