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Hi! Ho Ho, please do the .tran simulation w/O R between the inputs of opamp, and also I would like you to send these simulation results to me. According to ac analysis, the main pole should at the VO terminal, so a very large Cap connected to ground exist. To reduce the cap size, you can do a...
Thanks khouly! According to your suggestion, the resulted Q is just the value under the condition that VCO cross-coupled differential pair(NMOS pair) bias only with DC value. My mean is how to simulate the Q value when the VCO oscillate. I think the Q value under the two cases is different.
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