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inverting pnp circuit

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batman

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can someone show me a schematic using a pnp transistor that inverts a logic signal? for example, high input = low output, and vice versa? thanks
 

Nigel Goodwin

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batman said:
can someone show me a schematic using a pnp transistor that inverts a logic signal? for example, high input = low output, and vice versa? thanks
Exactly the same as an NPN one, just flip the entire circuit upside down.
 

batman

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you mean switch the positive an ground supplies, or just the transistor, or both?
is there a way to do it with an npn?
 

Nigel Goodwin

Super Moderator
Most Helpful Member
batman said:
you mean switch the positive an ground supplies, or just the transistor, or both?
is there a way to do it with an npn?
As you asked for PNP, I thought you knew about an NPN one!.

Here are simple examples of both, depending on the actual outputs feeding them you may need to add a resistor between the base and emitter of the transistors.
 

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