Understanding the Bode Plot: Frequency vs. dB

AI Thread Summary
The discussion focuses on the axes of a Bode plot, clarifying that the x-axis can represent either angular frequency (omega) or frequency (f), while the y-axis is expressed in decibels (dB) using the formula 20 log(|H(jw)|). A user seeks guidance on setting specific ranges for the axes in a Nyquist plot, detailing a transfer function for context. Another participant advises starting a new thread for unrelated questions to maintain clarity. The conversation highlights the importance of proper axis representation in frequency response plots and the need for organized forum discussions.
math&science
Messages
24
Reaction score
0
Is the x-axis of a Bode plot supposed to be angular frequency omega or just the frequency f? The y-axis is in dB. Thanks!
 
Engineering news on Phys.org
Usually when I draw it on paper, I have it in angular frequency [rads/sec] (log scaled). The y-axis is 20 log (|H(jw)|) [dB].
 
hi, i would like know how to set the range on the axis? for an example i want to plot a nyquist plot with the range of x-axis is from -0.08 to 0.02 and the range of y-axis is from -0.2 to 0.2. (with the system G =(5s + 200)/((s)*(s^2 +4s + 10)*(s^2 + 10s + 150))...

please help me out here if anyone knows how to write in the m.file(MATLAB)...thanks
 
Welcome to PhysicsForums! For future reference, whenever you have something like this (a somewhat related question that nevertheless does not directly follow from the previous items) you really ought to start a new thread, not resurrect one that's 4 years old!

In any case, take a look in this thread:
https://www.physicsforums.com/showthread.php?t=303967

(Second mention in less than 3 hours!)
 
sorry about that :)
 

Thread 'What happens if shielded cable has a short to the shield?'

While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the shield has the same cross section area. There are insulating material between them, and in both ends there is a short between them. My first thought, the total resistance of the cable would be reduced...
View full post »

Thread 'Underwater piezoelectric sensor array receive sensitivity'

Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
View full post »

Thread 'Question about bonding ground and neutral'

I am not an electrical engineering student, but a lowly apprentice electrician. I learn both on the job and also take classes for my apprenticeship. I recently wired my first transformer and I understand that the neutral and ground are bonded together in the transformer or in the service. What I don't understand is, if the neutral is a current carrying conductor, which is then bonded to the ground conductor, why does current only flow back to its source and not on the ground path...
View full post »

Similar threads

Inverting op amp frequency response Bode plot help
Replies
13
Views
3K
LTSpice functionalities regarding its Frequency Domain Analysis
Replies
18
Views
3K
Justifying the peak closed loop gain of an op-amp circuit
Replies
3
Views
2K
Bode Plot Application: Increase Frequency Response & Magnitude Understanding
Replies
12
Views
3K
How do I see the gain from this Bode plot? (simple)
Replies
4
Views
9K
Bode Plots & Frequency in Control Systems: Demystified
Replies
3
Views
2K
Analysing bode plots. Stability
Replies
6
Views
4K
How do you do a Bode plot comparison with LTSpice?
Replies
9
Views
3K
Understanding the Relationship Between Poles, Zeros, and Bode Plots
Replies
11
Views
6K
Frequency selective surface radome
Replies
7
Views
2K

Hot Threads

Recent Insights

Back
Top