B batman New Member Jan 7, 2004 #1 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
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 Super Moderator Most Helpful Member Jan 7, 2004 #2 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 Click to expand... Exactly the same as an NPN one, just flip the entire circuit upside down.
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 Click to expand... Exactly the same as an NPN one, just flip the entire circuit upside down.
B batman New Member Jan 7, 2004 #3 you mean switch the positive an ground supplies, or just the transistor, or both? is there a way to do it with an npn?
you mean switch the positive an ground supplies, or just the transistor, or both? is there a way to do it with an npn?
C ChrisP Member Jan 7, 2004 #4 batman said: is there a way to do it with an npn? Click to expand... Here's a simple NPN Inverter -- this should get you started... **broken link removed**
batman said: is there a way to do it with an npn? Click to expand... Here's a simple NPN Inverter -- this should get you started... **broken link removed**
Nigel Goodwin Super Moderator Most Helpful Member Jan 7, 2004 #5 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? Click to expand... 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. Attachments invert.gif 1.4 KB · Views: 561
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? Click to expand... 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.