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241 Threads found on Linear Phase
Is there any other methods that can be used to plot the frequency response of the nonlinear closed loop system? Because from what I know, the frequency response/bode plot in matlab can be used only if the system is linear. Thanks in advanced. attached is the nonlinear closed loop system. 137423
Hello Everyone !!! I'm simulating a linear 4 elements patch array on ansoft designer v2.2 at a single frequency I've placed, in the planarEM, the four patches with separate ports. Now I need to view the antenna beam moving with the phase difference of the port excitation. If i simulate the network and, after, i visualize the far-field,
The Laplace transform is used for the VCO transfer function. Such a function is defined for linear conditions only. Therefore, it applies to the PLL under locked condition only - and this is the key for an answer to your question: The PLL linear transfer function - hence, also the VCO function - is defined in the phase domain only. And for (...)
Hi. I have one practical question; please help! Input is single-phase grid voltage (230 VRMS, 50 Hz, 16 A circuit breaker) feed to full-bridge diode rectifier. Output DC power is 2.3 kW. Adding the output DC capacitors rectifies DC voltage, but the input current becomes non-linear with RMS and peak values exceeding circuit breaker r
The best lab supplies in the 70's came from Lambda and they used SCR's with phase control to regulate the minimum dropout voltage required (aka pre-regulator) for the stage 2 Power linear regulator. This way the tradeoff between peak/avg pulse currents and related ripple voltage could be optimized for least power loss and lowest ESR in the power s
did you try to reverse the speaker polarity? If feedback is in phase at >unity gain, it will cause oscillation or howling. IF phase shifts 180 deg, at different f, but at a higher feedback, then a quality factor of non-linear response as AG indicated is your problem. Generally cheap mic's have background noise cancellation by having a (...)
You should first do a linear open-loop analysis to see if you have enough gain and phase-shift to satisfy an oscillation condition with the device you intend to use. Once that is done you could investigate it further by using harmonic balance evaluation.
See pp.29-30 of
I think it is the range of angles in which the responce of the pll (phase frequency discriminator) is linear without dead zone.
In the linear tracking mode, you can frequency modulate the signal with a sine wave and measure the loop response to determine the -3dB point. Loop gain and obviously the VCO gain and range in particular influences the -3dB bandwidth set by just the LPF's but since phase error is limited and non-linear beyond the type II range, this will (...)
There is a non-linear effect of Loop BW on Capture range and lock-in time. THe error signal in f must be within the loop bandwidth. Using CMOS analog switches , one can change the bandwidth after locked as long as an offset is not induced or a large transient pF pulse discharge. Or one can use a linear AGC approach to change bandwidth smoothly.
How have you configured your microstrip , stubs and slots for polarization and reactive loading? Have you considered linear and circular polarization with two near-degenerate orthogonal resonant modes with equal amplitudes and a 90◦ phase difference?
I don't think so - PF is the time relation of voltage and current. THD is going to arise from the nonlinear elements (e.g. diode bridge, active switches) in your PFC circuit "doing their thing" in a not-smooth-L-C way. I suppose at different power factors the nuances of harmonic generation might change some, but this is about the operating behavio
Hi all, Is there any way to find the phase noise of a PLL using any model in cadence. I know how to run individual block phase noise using ADEL. But incase of a PLL loop its taking to much of time. That is why I am asking any simlify model to find the phase noise of a PLL. Please help me. Thanks.
I don't understand what you mean with "known form"? It's a passive RC network, it's transfer function can be derived by applying basic AC network calculation. In this case, only the magnitude matters. Then use a nonlinear solver to fit the transfer curve to the intended magnitude characteristic. You can e.g. use the Excel solver or the MINPACK l
Dear Friends , I am driving a circuit i nwhich in which i am using delta ac drive to control speed of 3 phase motor.The drive converts the single phase to 3 phase voltages . The problem is the moment ac drive rotates the motor , I see noise in the 5V linear power supply or smps(meanwell) power supply . The noise (...)
phase Noise id principally dominated by Quality Factor of the Tank Circuit in MW Oscillators regarding to linear phase Noise approximation of Leeson.There are obviously other noise related parameters such as NF, Flicker Noise corner frequency,Voltage Swing,OP Current etc. but Q factor is essentially dominant. An accurate and robust (...)
Even using resistive loads , PF degrades with a missing phase and phase imbalance can result in six(6) times increase in line loss if using only one (1) phase but only 50% more with 2 phase working with same load. Also 2 of 3 phase motor windings can burn out from stall current. Consider a constant (...)
The Touchstone file format is simple ASCII, so you can manually re-format text files to S2P. Basically, you just need to see what frequency units you have, and what data format (real/imag or linear magnitude/phase or dB/phase) and then write the corresponding header line. Here is the file format description: