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Ok, that make sense now. So if I use 48.9 MHz, and this resonant circuit is acting as bandpass, therefore I can use something like 330nH and 32 pF to pass 48.9 MHz, is that correct?
Hello, I am quite confused about using the fundamental trap to remove fundamental mode oscillation. I use sa612 and in datasheet application circuit the advised values to remove fundamental frequency are 1nF and 0.5 to 1.3 uH. This values remove the frequency of 4.4 to 7.1 MHz.
However the...
Hello again,
Thank you for a quick response. I was on vacation now back to the problem. I couldn't find a better source for capacitive tap network then Thomas Lee book. Could you recommend something else? Because I tried his method and the values I come up with different then yours...
Thank you for a quick response,
I used Thomas Lee book to estimate the values I need for 38.2 MHz with bandwidth of 2 MHz, therefore Q is 19.1. However I end-up with 1.3 k ohm. The other problem is that I only have 150nH, 220 nH, 1.2uH variable coils.
I have done calculations that are attached...
Hello,
I am using SA612 mixer for down conversion, Before the mixer I have image filter that is designed using coupled resonators. In SA612 datasheet the proposed circuit is to match the single input to differential output is a LC balun network, however I do not understand the math behind it...
Thank you for a quick response. Well from the detector I have an envelope signal, I need to take a sample of it every 75 ms (somewhere in a range of 50-100ms actually, i decided to take middle, so every 75ms). So is it going to work if I just put RC integrator (RC low pass filter) after the...
Hello,
It is probably a simple question, but I struggle with this a little. I use an RF detector and I need to integrate after the detector, so I have about every 10's sample or less.
If its detector, that should basically produce an envellope, is it possible just to use low pass filter as...
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