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73 Threads found on Design Folded Cascode Opamp
Hello everyone, I have been facing problem in designing a folded cascode CMOS opamp. I have designed the mosfets aspect ratios for the amplifier circuit but i could not design the bias circuit. I admit i am not very good at designing circuits. so can people here help me (...)
I need folded cascode design step by step, i want to implement it on cadence 180nm suggest me the procedure or ieee paper through which I can design folded cascode opamp using cadence
Hi All, I have a student project "design a high-voltage CMOS opamp", and I have two questions: Wich architecture is better for high voltage opamp (Voltage range 50-110 V) and why? If you have a papers or books related to my topic, please give a link. Thanks in advance, Vadim
can somebody plzz tell me what actually affects the gain of folded cascode operational amplifier..... n how to increase the gain of folded cascode aoperational amplifier...???????
Hi Jyotimaya You can follow this link to design your opamp - - - Updated - - - Hi Jyotimaya The previous link help you to design single output first after you have done it , here is differential output with cmfb and bias file
Hi, Can you guys please help me with designing the bias circuit for the fully diff folded cascode opamp (attached) i.e., to generate the bias voltages Vb1, Vb2, Vb3. 108205 I tried to search in many books, but none seem to explain properly the biasing schemes that can be used. Any reference to relat
Hi, I am designing an 10 Bit 200 MSPS Pipeline ADC in TSMC 65nm process. Just finished the design of first stage opamp. It uses the "folded cascode Gain Boosted opamp" architecture. The supply voltage is 3.3V. The total current drawn from the supply is around 90mA. Therefore, the first (...)
Though i did not design the LDO for your specs..but the structure on CMOS may look something like shown in figures attached. I used folded cascode opamp for error amplifier with output stage W/L chosen for 10mA output current. My supply voltage varies from 3.2V to 4.2V. obrazki
Hi, I have designed a folded cascode two stage opamp on 130nm process. The opamp works fine. Figure below shows the gain and phase response of opamp. It has 45 degree phase margin. Now the next step is to design circuit which generated the bias voltages for (...)
Hi, I designed a folded cascode opamp with gain boosting and it works properly, now I want to design biasing voltages of the opamp. I could design a biasing circuitry for the main opamp, but I had a hard time finding a way to generate the dc voltages that (...)
hello frnds, i am designing folded cascode opamp. For analysis purpose i need source code for ICMR,Offset voltage, PSRR, noise margin. i am using tanner tool. i.e TSpice analysis code is required. i find gain of my design is 170dB. so, i am doubting on my design. thanks, Prati
Hi I wanna design an opamp (2 stage folded cascode) where can I find analysis of this opamp? I need to know poles,zeros,unity gain,... for designing? plz help me I wasnt able to find any book or paper.:cry::cry: tnx
I am designing a folded cascode opamp with a single-ended output and that has both NMOS and PMOS input differential stages (for wide input common mode range). All the circuits I see, however, have a differential output. Is the bottom design a correct implementation of a single-ended
I am suppose to design a folded cascode opamp with considerable gain and high bandwidth with low power. (1.2V and 300uA total current). I am new to designing. Kindly anyone suggest me some papers or materials or books on the folded cascode design procedure.
i think y should refer to chapter 9 of professor razavi's book (design of analog cmos integrated circuit).y will get the basic benefit of ICMR
Its an integrated circuit design. I am using a folded cascode, and I use Cadence Spectre to do the trasient analysis.
Hi, I am a novice analog designer. I am going to design an opamp for bandgap application in 130nm technology. My opamp should have High gain good bandwidth low offset low power. Maximum on current is 5uA for entire bandgap I have chosen two stage miller opamp. 1. How shall i choose my bias (...)
David M. Binkley "Tradeoffs and Optimization in Analog CMOS design" Chap. 5.2.2 cascoded OTAs: design descriptions for two cascode OTAs with 2 different power consumption vs. GBP flavors in a 0.18?m CMOS process.
u should be able to hit 70dB gain easily using folded cascode design.... 46dB sound likeu dont have transistors biased correctly. use 5-10 times minimum length for current sources/rail devices and 2-3 times minimum L for your cascodes. this will give u good output impedance.
I am trying to design an op-amp with rail to rail inputs and am finding an issue with the symmetric input stage trick. I am limited to a process with no floating gate and nothing fancy like triple well. I have tried two approaches, one with a simple dual (symmetric) nmos and pmos differential pair and also with a dual folded cascode (...)