transistor internally is causing fluctuating

Thread Starter

Billy Mayo

Joined Mar 24, 2013
70
Therefore the diode is added so that the base does not get a negative voltage that would damage it.
But the diode only protects the transistor , of how many negative volts? the diode is only 0.5 volts, so is the negative voltage is more than -1 volts it will damage the transistor because the protection diode is only 0.5 volts to turn it on

Any negative voltage more than 0.5 volts will turn on the protection diode?
 

Thread Starter

Billy Mayo

Joined Mar 24, 2013
70
Using Transistors as switches

Don't they have hysteresis problems? how do you not have hysteresis when using transistors as a switch?
 

Thread Starter

Billy Mayo

Joined Mar 24, 2013
70
Normally a transistor switch has no hysteresis. It simply switches on or switches off.
You can add hysteresis to a transistor switch if you want.
When do you need to add hysteresis to a transistor switch? when the input on the base is what kind of signal?

Why would a designer add hysteresis to a transistor switch? for what reason?

Hysteresis is simply some positive feedback
Why would positive feedback give you hysteresis?
 
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