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Thanks again for all your replies. They have been helpful.
Just to be really sure about my fundamentals, I would like to confirm the following
1) Vgs changes everytime with Vin right? Like in the instance of increasing Vin from 1.5V to 2V as stated by the author. If that's the case, then I...
Hi,
Thanks for the replies.
What is the interpretation of nonlinearity in this context? My interpretation is simply having Vout not linearly proportional to Vin and that's nonlinearity for me. Is this correct or there is a broader meaning to nonlinearity?
Hope to have your thoughts and...
Hi all,
In Razavi's book on the chapter of single-stage amplifiers, I came across the section explaining the non-linearity property of source followers (page 69, paragraph 3). The author mentioned that "...For example, if Vin changes from 1.5V to 2V, Id may increase by a factor of 2 and hence...
You guys are right. For proper operation, M3 (including M1 & M2) must all be in saturation. M3 simply acts as a current source in that sense.
I came across this circuit in Razavi's book discussing the basics of analyzing this diff pair qualitatively. And, the author mentioned varying the common...
Hey KerimF,
Thanks for replying. The assumption of treating M3 as a resistor first is valid and I did had that in mind. However, to model M3 as a resistor, it will mean that M3 is already operating in the linear region and for that to take place, Vs must be less than the overdrive of M3. But...
Hi,
Inserted is a basic diff pair circuit and I am trying to analyze its common-mode behaviour. But before that, I realized that my thoughts have already been trapped without knowing how the source coupled voltages (Vs) of M1 & M2 vary at all. This is really painful as
1) Without analytically...
Hi erikl,
Thanks for the reply once again. I will check that out and see how it turns out again. Will keep you guys posted. Really hope to get this working.
Hi FvM,
Any comments?
Regards,
Shawn
Hi erikl & FvM,
Thank you so much for the responses. However, I still have some doubts on the operating aspect of this circuit. In addition, I will explain my take on the overall design of my circuit.
Thanks for pointing out that. As a matter of fact, I do not have the option to work with...
Hey erikl,
Thanks for the reply. I understand what you are trying to say. As a matter of fact, the SC is not really a FVC. Perhaps I got my terms wrong.
Nevertheless, according to the original paper I've attached before, the SC network should come into play and function as accordingly as what...
Dear all,
Sorry for the late post. I've did whatever I could in testing out my switched capacitor based FVC and it turns out to me that it's working. Maybe I'm wrong but just to be on the safe side, I have attached the FVC test schematic setup as well as the switched capacitor circuit making up...
Hi FvM,
I may have overlooked your suggested step. Sorry about that.
Just to update you, I tried testing my FVC (implemented as a switched capacitor circuit) independently much earlier. Here's how I did:
1) I fed an external pulse to fosc input which is similar to what the VCO would be...
Hi erikl,
Thank you so much for the effort in drafting the step by step procedure to assist me. Sorry for the late update as I went on today enthusiastically to test things out as soon as I saw your revert. Now, I do hope I got my understanding right based on your explanation while I was...
Hi erikl,
Many thanks for your reply. However, there are still some points that I'm quite unclear about. Hope you will continue to guide me along.
As a matter of fact, I did try to include the feedback resistor earlier before my post. However, from the paper alone, the author has not included...
Dear all,
I reckon it would be clearer to attach the exact same schematic taken from the paper that I had referenced on. It's shown above.
Considering this circuit, what kind of response should I expect at the opamp output? Is it possible to generate a range of values say from 1.2V-2.2V at...
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