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Old 30th December 2005, 08:24 PM   #1
Zodiac is offline Zodiac  United States
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Default Transistor current souce, negative supply

Stupid question but

if you want a current source on a negative power rail say -5v do you need a PNP or NPN transistor to do this?

basically I want to emulate a PNP transistor current source on the +5v rail..

Thanks for your help
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Old 30th December 2005, 08:28 PM   #2
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Default Re: Transistor current souce, negative supply

Quote:
Originally posted by Zodiac
Stupid question but

if you want a current source on a negative power rail say -5v do you need a PNP or NPN transistor to do this?

Hi Zodiac

You need a NPN!

Regards
__________________
Jorge
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Old 31st December 2005, 04:47 PM   #3
Zodiac is offline Zodiac  United States
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Thanks!
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