Meaning of VCC?

12th October 2002, 10:38 PM

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?

Bakmeel · 13th October 2002, 11:05 AM

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

13th October 2002, 08:24 PM

thanks

Circlotron · 14th October 2002, 02:42 AM

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.

alvaius · 14th October 2002, 02:49 AM

Circlotron, you are correct. Purely a matter of convention.

12th October 2002, 10:38 PM	#1
CryingDragon Guest	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?

13th October 2002, 11:05 AM	#2
Bakmeel diyAudio Member Join Date: Jan 2002 Location: The Netherlands	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 __________________ More Power Igor! More Power!

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14th October 2002, 02:42 AM	#4
Circlotron diyAudio Member Join Date: Jun 2002 Location: Melbourne, Australia	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.

14th October 2002, 02:49 AM	#5
alvaius diyAudio Member Join Date: Feb 2002 Location: Toronto	Circlotron, you are correct. Purely a matter of convention.