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Old 12th October 2002, 10:38 PM   #1
CryingDragon
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Default Meaning of VCC?

Does this stand for a single rail supply? My schematic shows multiple grounds and a + and + VCC do i use a dual rail supply on this or a single and ground the -VCC with the other grounds?
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Old 13th October 2002, 11:05 AM   #2
Bakmeel is offline Bakmeel  Netherlands
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VCC always stands for the positive power rails. Often, it is the most important rails. Other voltages are then denoted with their voltage or, in your case, simply with "+".

VEE is the negative power rails, and VDD is the common rails. The latter one is not to be mistaken with the ground (but often is connected to it). Then there also can be signal grounds, and digital grounds. These two are ony connected at one point in the schematic. Often near the Power entry.

Regards,
Bouke
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Old 13th October 2002, 08:24 PM   #3
CryingDragon
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thanks
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Old 14th October 2002, 02:42 AM   #4
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I always thought Vcc and Vee were collector and emitter supply rails, and Vdd and Vss were drain and source supply rails. Not certain though. Anyone else?

GP.
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Old 14th October 2002, 02:49 AM   #5
alvaius is offline alvaius  Canada
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Circlotron, you are correct. Purely a matter of convention.
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