What is parasitic resistance / capacitance? - Electronic Circuits Projects Diagrams Free

fabbie · 7th December 2005, 10:04 AM

Hi, need some help in finding out what is this exactly.

when i was actually designing a PCB board, someone told me that the tracks of a circuit shouldn't be too close(0.5mm apart). And this has something to do with parasitic resistance / capacitance. But i have no idea what it is.

I already searched using google but i can't find any definition on it? Can someone please explain what is parasitic resistance / capacitance and how does it actually occur?

thanks alot in advance

**Nigel Goodwin** · 7th December 2005, 10:33 AM

A capacitor is two conductors seperated by an insulator - which is EXACTLY what two nearby PCB tracks are. This is only likely to be a problem under certain circumstances, and normally only at very high frequencies.

As you haven't mentioned what your circuit is?, I can't suggest if it might be a concern - but unless it's a high frequency RF circuit, it's very unlikely.

Russlk · 7th December 2005, 08:56 PM

Parasitic resistance/capacitance is any that you don't want.

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7th December 2005, 10:04 AM	(permalink)
fabbie	What is parasitic resistance / capacitance? Hi, need some help in finding out what is this exactly. when i was actually designing a PCB board, someone told me that the tracks of a circuit shouldn't be too close(0.5mm apart). And this has something to do with parasitic resistance / capacitance. But i have no idea what it is. I already searched using google but i can't find any definition on it? Can someone please explain what is parasitic resistance / capacitance and how does it actually occur? thanks alot in advance

7th December 2005, 10:33 AM	(permalink)
Nigel Goodwin	A capacitor is two conductors seperated by an insulator - which is EXACTLY what two nearby PCB tracks are. This is only likely to be a problem under certain circumstances, and normally only at very high frequencies. As you haven't mentioned what your circuit is?, I can't suggest if it might be a concern - but unless it's a high frequency RF circuit, it's very unlikely. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

7th December 2005, 08:56 PM	(permalink)
Russlk	Parasitic resistance/capacitance is any that you don't want. __________________ see my website: www.geocities.com/russlk