Transmission line at DC

Thread Starter

hoyyoth

Joined Mar 21, 2020
137
Dear Team,

Do we need to consider a PCB trace as a transmission line when the Input is a DC signal.

As per my knowledge we used to consider PCB trace as a transmission line when length of the trace is more than Wavelength/20.

Wavelength is derived from the signal frequency ,for DC signal frequency is zero so no wavelength associated with the signal.
So no need to consider the PCB trace as transmission line at DC.May I know I am correct or not.

Regards
Hai
 

MisterBill2

Joined Jan 23, 2018
9,499
While normal transmission line considerations will not apply to DC, power transmission considerations including voltage drop and resistance heating will still apply. But those are simpler to deal with.
 
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