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• Yesterday, 18:15
When I thought about gain boosting I have simple fully-diff solution (triple pair to have CMFF instead of CMFB) like below: I didn't read...
14 replies | 912 view(s)
• 6th April 2020, 17:27
Basically 3Vt (≈80mV) is an input differential voltage range of a BJT diff pair (you can check math analysis in Grey, Hurst, Meyer book "Analysis and...
5 replies | 229 view(s)
• 4th April 2020, 21:51
I told you, it might be hard. Above consideration were taken for "typical" corner. Fast transistors might be strangled by output stage biasing....
14 replies | 912 view(s)
• 3rd April 2020, 17:09
If separated circuit works, but fails in opamp it simply means, your output stage biasing kills all. Make it matched to current source.
14 replies | 912 view(s)
• 2nd April 2020, 18:26
I see a problem in your biasing scheme. However, I will not show you what is wrong (sorry, I am too lazy). For double cascode guy, I would simply go...
14 replies | 912 view(s)
• 31st March 2020, 21:16
That's all. Keep current density constant. I do not see clearly, whether mosfets connected to rails are current sources or some of them should...
14 replies | 912 view(s)
• 29th March 2020, 21:31
1. Cascodes biased properly never goes into triode. 2. 20dB gain drop in MC is a lot - i suspect lack of balance between transistors. In this guy,...
14 replies | 912 view(s)
• 29th March 2020, 11:21
Look on this: https://en.wikipedia.org/wiki/Commensurate_line_circuit
3 replies | 295 view(s)
• 28th March 2020, 19:58
Available headrom for you current sources is the vgs of output transistors and/or vgs of diodes on the rails. The minimum value of vds for 3 mosftes...
14 replies | 912 view(s)
• 20th March 2020, 18:06
Look for it in the spectre installation directory
1 replies | 245 view(s)
• 20th March 2020, 18:03
It's ordinary Miller OTA working in class A-AB. it is wideband because is not narrowband (it is not a joke). Don't pay too much attention to names....
6 replies | 480 view(s)
• 16th March 2020, 17:33
The buety of numerical simulations... You can try VerilogA, apply some delay in vcvs, try to play with ahdlib blocks or simply use value() function...
10 replies | 767 view(s)
• 15th March 2020, 20:29
If I understood properly, gain in vcvs is important. Try to use svcvs element instead of vcvs. Svcvs is vcvs with Laplace transfer function, so...
10 replies | 767 view(s)
• 15th March 2020, 17:34
I'm not sure whether is possible to remove discontinuity using relay element. If you need ideal system for behavioral modeling, why not write...
10 replies | 767 view(s)
• 15th March 2020, 17:28
There are various breakdown mechanism and we can distinguish: 1. Hard breakdown (permanent damage) 2. Soft breakdown Also, transistor is...
8 replies | 591 view(s)
• 14th March 2020, 22:21
Read process documentation. There is an answer for your question. And be mercy ul for us. You even didn't mentioned what kind of transistors you...
8 replies | 591 view(s)
• 14th March 2020, 22:15
I am too lazy to calculate. What has bigger impact - gain of vcvs or rise time of clocks? If gain (gain of vcvs is 1M, cap divider is 1m product is...
10 replies | 767 view(s)
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