All Questions
Tagged with closed-loop bode-plot
9 questions
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Estimation of bode plot of closed loop system based on open loop characteristics [closed]
I just got an exam back in which I did the error of not drawing the phase part of the bode plot of a closed loop system. The question sparked, how does one estimate the shape of the phase plot of a ...
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Why do we talk about system stability as a whole when Barkhausen criteria is valid only for one specific frequency?
The relationship AB=1 will be applicable only at a specific frequency. For instance, following is the bode plot for a circuit I have and as can be seen, the barkhausen criterion is met only at 6.3MEG ...
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How to determine the phase margin when the Bode plot never crosses 0 dB?
I have a graph that looks like this. I am tasked to measure the phase margin, but the graph doesn't exceed 0 dB.
The circuit is this. The input DC level is 0.6 V, which is the problem. When I change ...
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Bode phase plot phase margin
From what I have studied so far, gain margin is defined as how much additional gain the system can be given before it becomes unstable, and this can be measured from the bode magnitude plot ...
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Can any one explain what type of compensation is this
I will be using the UC3844 controller IC in combination with TL431 to achieve peak current mode control in a 150W forward converter. After some research, I found this schematic on the internet:
There ...
- 180
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3
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unstable systems with positive phase/gain margin
Open loop Phase/Gain margins provide information on how much margin the closed loop system have until it becomes unstable. In other words, how much you can increase the effective loop gain and or ...
- 61
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Closed loop system stability with Bode
Stability of the closed loop system (with -1 feedback) can be assessed via Bode plot gain/phase margin analysis of its open loop system.
How can one deduce stability of the closed loop system directly ...
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1
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Why is the slope of the op amp graph 20 log (AB) in this application note
I am going through the following guide for op amps :
http://web.mit.edu/6.101/www/reference/op_amps_everyone.pdf
On page 87 (screenshot attached) there is a bode plot which has got me slightly ...
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Phase margin is 90° but transient step response shows overshoot
The Bode plot of the loop is as shown here:
The transient step response looks like this:
The block diagram looks something like this -
basically a single stage op-amp (OPAMP in figure) with high ...
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