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Does that help him find the resonant frequency?Hint: the circuit is a voltage divider.
Good Day All;
Could someone help me in this question?
Calculate the resonant frequency of the circuit in Figure in the attachment.
Does that help him find the resonant frequency?
It is a trick question. It has no resonance; it is a low pass filter.
I assume you mean 90 degrees?I would use the frequency at which the phase angle difference between the input and output goes to zero.
MrAl,
I agree with your analysis, but I believe F3=0.3514609010Hz. Also another definition for resonance could be the frequency where the imaginary part of the impedance of the total circuit is zero. That would be F4=0.3468701566Hz.
Ratch
Not necessarily when discussing just the LC network or crystal network in the feedback path of an oscillator. I have yet to find an amplifier which has EXACTLY 0 or 180 degrees of phase shift... The actual oscillation frequency is a just as much a function of the loop phase as it is the amplitude.I would think the correct resonant frequency would be, if it were put in a feedback loop to form a oscillator, what would be the oscillation frequency? I would expect that to be where the output voltage across the capacitor and resistor is maximum.
Oh really...how did you arrive at F3=0.35146 ?
I'll double check my analysis for that condition (maximum Vout where Vout is the voltage across the capacitor and resistor) and get back here.
There may be other frequencies. There is a guy who redefined what resonant frequency really is, and found several candidate points for most circuits. It's based on some interesting math and it's even on the web somewhere, but i cant remember where now I suspect a really good search on resonant frequencies would turn it up again.
We probably just confused the OP by now anyway, as this is what usually happens when this question is asked on a web site. There are several different interpretations as well as several different candidate points for each interpretation so it gets confusing sometimes. The one the basic courses usually look for is the power related one where capacitive reactance equals inductive reactance.
I would think the correct resonant frequency would be, if it were put in a feedback loop to form a oscillator, what would be the oscillation frequency? I would expect that to be where the output voltage across the capacitor and resistor is maximum.
VamplMax= 4.5003516037041
Vampl_Left= 4.50035160230076
Vampl_Right= 4.50035160230075
Vampl_Test= 4.50034729587394