Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Sorry but I disagree. A filter will most definitely have multiple poles, so also a phase variation of several 360 degrees. In case the isolation is insufficient, the filter will increase the likelyhood of oscillation instead of reducing it. In my opinion, make sure that the isolation is okay...
I agree with you that the noise power increases, but so does the output power. Typically a noise generaion is proportional with the bias current, but the output power is squared proportional. So in general the oscillators with best phase noise have highest power consumption, because the SNR...
I presume that the commercial gain block is unconditionally stable, and has a gain of 20dB. If it's not, look for another one.
The problem with high gain stages is parasitic leakage of the big output signal to the input. Simply said, if the isolation between the output of the chain and the...
In many cases to obtain better a phase noise you prefer to have a bigger bias current. That increases the saturation output power of the oscillator, and hence also the sine signal to oscillator noise source levels. But you should be carefull not to increase it too much because you can overstress...
I would suggest to use a second waveguide port. This can be also 50ohm, and then you post-process the S-parameters using template based post-processing to change the impedant at port 2 to 100 ohm. Alternatively you change the line impedance at port to 100 ohm directly and you'll see the results wi
Decimation is not possible because the chirp rate is 1mbps.
Do you mean that the dynamic scaling is done automatically by the FFT core? How does this work for a single-shot FFT? how is the dynamic scaling done if there's no dynamics involved?
Is it a correct working assumption that it is...
Right on track!
The 1 bit input is indeed a bit strange. It comes from a 1-bit digitizer from a GPS front-end. The GPS signals are under the thermal noise and need to be demodulated with processing gain. Therefore the stream is in fact random noise.
The goal of the FFT is searching the...
Hi all. I am rather new to the domain of digital signal processing so I would like to know how a seasoned veteran handles this design.
I have a 1-bit signal stream, and need to take a 1024-point fixed point FFT. Worst case the signal could be a constant 0 or 1.
* How do you select the number of...
I assume it has something to do with the definition of the E-field at the ports. There are two possibilities what edge the E-field of the TE10 mode starts from and where it ends. This can confuse the phase of your results.
This application note will definitely help you:
"Specifying Calibration Standards and Kits for Agilent Vector Network Analyzers"
I assume you have the formulas for performing the 12 error-term calculations?
The figures of merit of an oscillator are phase noise, supply pushing, and tuning sensitivity. In case you meet these specifications you don't care about DC bias shifts.
If the phase noise is degraded, you can start to investigate why. You can decrease the bias shift, but this will mean that...
I think the transistor is oscillating indeed. You can measure this by putting a pickup probe in proximity to the drain and measuring on the spectrum analyzer. In case the transistor is a MESFET, a junction exists between gate and source which is normally reverse biased, but can start to conduct...
There are two things going on in your design.
1. As you already mentioned correctly, the bondwire transition degrades the performance of the filter badly. You can see this in the simulated return loss of the filter. I assume the return loss caused by this transition is around 10dB, but you have...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
