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142 Threads found on edaboard.com: Layout Of Inverter
i m making layout in umc 90nm i m having these DRC errors ... plz help me in rectifying these errors..... and tell me that can we use switches related to metal density and poly density....... i m attaching the screenshot of layout of inverter......... 1) 6A.ME1_SR: Die corner rule 1, ME1 must draw with 135 angle 2) (...)
Hi richmon74, I think u know electronics and softwares well? If so u simply need followings to complite our project: ----------------------------------- 1.Hex code of the controller. 2.PCB. 3.Components in the project. 4.Soldering acessories. 5.Programmer for programming/writting the codes to the uC. --------------------------- OR OR OR
hi all, i want to design cmos invrter layout design can anyone give me the idia how to design this in detail pls. The book "CMOS Digital Integrated Circuits: Analysis and Design" by Sung-Mo Kang and Yusuf Leblebigi has a few version of inverter layouts and they are in colour.
Hi,all! I use the intrinsic capacitor of inverter as a delay. Is it accurate to simulate the intrinsic capacitor by hspice? Thanks I think it is a common practice to use the inverter as dealy cell. But you need to verify your design with all PVT corners. Also, you still need to count into the internect dealy in lay
hello everyone, I need schematic diagram and pcb layout of Auto Power inverter, approximately 1000wat or 1500wat power. Sample inverters for sale,
Hi Members, I'm planning to draw the layout of a circuits based on RF CMOS transistor. I'm looking for a material or tutorial showing how to do that and the consederations to take into account. I need a very basic tutorial such as CMOS RF inverter or CMOS RF dff layout tutorial. In fact a big difference exist between the conventional (...)
Hello there,I am Randolf F.Abadier, I hope that someone can helped me to have a design with pcb layout about a dc ac inverter.I am planning to built one to help our country man to have an alternative source of energy,It will be a big help for us filipinoes,now that our monthly bills of our electric consumption are getting higher each month, Th
It is used when you want to increase transistor width but space is limited for some reason. This technique is used especially in memory layout design when word line driver or sense amplifier should match the memory cell width and length. On your picture it seems a Standard Cell layout with fixed row heigth but transistor width should be little
HI all, I am new to this analog layout designing.I have got two questions to ask you all people. 1. If I have three inverters say A and B and also again A which are of different dimensions(A and B), then I have created the layout of those inverters individually and even did the LVS of it to check its (...)
I am a newbie in ASIC design and I do not have much experience in working with design kits. I am currently trying to tape out a chip but working with the tools are having me a hard time. So as a simple exercise I decided to make a chip with single inverter and go through all the steps at once. I have IC 6.1 and Assura installed (+ Hspice ...). My d
Hey guys, I am new to layout and I'm using the mentor tools to make te layout of an inverter. I am not using any models for the transistors so Ill be drawing them from scratch. Does anyone have a basic tutorial that can help me with that??? Thanks alot
i am working on sklansky adders now as as a part of my maters it possible to layout a sklansky adder without having to write verilog code adviser told me to look at the sklansky adder in weste and harris text book and asked me to make a layout. The point is to size the gray cell which whose out
Today it is the 1st of April: April Fool's Day!!! Please take a look at the width of the PCB traces: at such power (1000W/12V) the MEAN current will be more than 80A. Let's suppose their width is 30 mils and the thickness of the copper 70 um, the maximum current (with a temperature rise of 40°C) possible will be 6A!!! Not me
hey u all my seniors, in my country there is lot of problem of load shedding even 14 hrs a day no electricity....... so i wana make my own UPS rectifire+inverter plz give me complete layout of pcb also circuit diagram complete details of components and their specification i hope u Einstein pple will help me..... if u can mail me
hey u all my seniors, in my country there is lot of problem of load shedding even 14 hrs a day no electricity....... so i wana make my own UPS rectifire+inverter plz give me complete layout of pcb also circuit diagram complete details of components and their specification i hope u Einstein pple will help me..... if u can mail me
Hi All, If I have a inverter connected directly my pad, then how do I layout this inverter protecting from ESD and Latch Up issues ? please explain in details. consider for example W/L of PMOS = 200/0.5 amd W/L of NMOS = 75/0.5. -- warm regards, krrao.
you just draw your PMOS and NMOS on schematics symbols and then transfer it to layout using stick diagram. =) It is the same.. XD ---------- Post added at 04:13 ---------- Previous post was at 04:08 ---------- Your NMOS gate will be conncted to your PMOS gate. Your Source of PMOS to +ve Power supply, Source
Hai, I want to make the layout of a delay element. So first i made the layout of an inverter. And i used the symbol in the schematic of delay element and from that i generated the layout. Next i want to do some optimization using hierarchy. For example i wanted to make the nwell common for all pmos transistors and use (...)
Hi i am very new to the cadence virtuoso layouts . I am trying to make a 6T SRAM layout . The schematic has two coupled inverters . I have recently added the Nangate 45nm layout in which it has already a inverter layout, so i am trying to use the create instance icon to place the (...)
LAT.3N P-well pickup OD to NMOS space > 30 um Connect substrate to GND to do that put M1_SUB in the blank spaces and connect them to GND with metal 1. LAT.3P N-well pickup OD to PMOS space > 30 um Connect N-WELL of PMOS to its source to do this put M1_NWELL and connect to its PMOS's source (or VDD). Put M1_SUB contacts as many as po
I think you should try to draw the layout by yourself, don't worry if you get wrong or error...it's a procedure of learning! You sholud try to draw a simple circuit, such as a push-pull inverter and try to simulate the circuit from netlist file. Always to use DRC(design rule check) to make sure your layout is follewed by the design rules! (...)
has anybody used both Cadence and Electric (the free layut tool). I wanted to know if there was any similarity in terms of functionality between both. I do not have access to cadence, if I practice on Electric (basic inverter cct and such) will that be good experience. Any pointers will be great Thanks, Beowulf
hi can anyone tell me where can i find std cell layout design guidelines.. i am new to full custom layout design. thus i want some material on it.. thanks in advance..
The Art of Analog layout by Alan Hastings, Roy Alan Hastings is a best book i think. here is amazon link
for me, your attached inverter schematic did not work at all. the picture was all black. anyway, you have a pulse transformer? probably not a good thing to use for motor control, because most motor control applications require variable duty cycle, from 0% all the way to 100%. you don't really get that with a pulse transformer. other option
Hi,guys, can you tell how to design large size output drivers(inverter) with large capacitive loads,with low on resistance(30 ohm). How to design layout in order to avoid latch up? what's ur output swing? and what's ur application ? if ur output is CMOS, (0 , 5V) then, 30 ohm is not a big deal in power electroics, cause ur c
hello: I got a strange problem with my layout when using calibre to do LVS. I just drew a 4 times big inverter and compared it with spice netlist. while the 4x inverter in the netlist is instantiated from a min-sized inverter like the following: .param W=0.15u .subckt inv in out vdd vss size=1 xmn out in vss (...)
Dear all, I have some quesiton. 1.If I have two block(analog and digital), My digital block has nor gate, nand gate and inverter gate. How much width do my power (vdd and ground)? I use tsmc 0.18?m. 2.If I have six metals, which metal have low resistor? Metal1 or metal6 3.How do I decide my power ring width? 4.Which material is Gurad ring?
Same width for the input transistor is for layout matching purpose. to reduce offset you can set the width bigger but there are limitation. You can put some sort of a buffer to get back rail-to-rail output swing. For example use inverter.
Look at the layout first. Usually output transistors and ESD transistors integrated in one large transistor that fingered by 40-50u with and surrounded by guard ring to prevent latch-up. So when designer need to increase output driving capability he should cut some fingers from ESD part and connect them to output part. The total transistor size a
Assalamo alaykom :) I think that you can do it using a buffer consists of two cascaded high speed inverters (but that depends on the allowed area available to you in you layout restrictions)... When making that buffer, your aim is to get sharp characterestics to be fast enough.. And notice that it will act as if your input to inverter (...)
i need to create a layout design for basic analog/digital circuits using cadence. i already have the circuits' transistor level schematics but i don't know how to start my layout design. actually, i don't have to design my own. i can use a layout design, do it in cadence, simulate in our computer and record results provided by the software. (...)
Hi, I am designing a block which has an inverters chain as buffer to drive a ~10pF capacitor load. In simulation, I found the peak current is high to ~140mA when the buffer is charging the load capacitor. Then when I layout the output buffer, what width I should select for VDD/GND line. It should be wide enough to tolerate the high to 140mA curren
Hi, I have trouble simulating even an interter extraction. I tried to use various means, including a config view, modification from the setup environment menu, the output is incorrect. I applied a Vpulse at the input and the ouput just tracks the input exactly (when Voltage 1 of the Vpulse is 0V); if the Voltage1 of the Vpulse is 3.3V then the ou
For standard cell based ASIC we design a number of basic primitives (like NAND,NOR, inverter,Mux,etc). The layout and schematic design part of this is called Library Development.. For timing and power analysis you should have all the information regarding a particular cell (e.g, for given input slew and output load how much delay it should have and
Hi, Our ciruit used a big inveretr as buffer to drive a ~10pF load cap to CMOS level. The working frequency is 155Mbps.The size of the inveretr is for PMOS 12/0.6,m=40 and for NMOS,it is 12/0.6mm=20. The process is 0.6um CMOS. We feel puzzled for how to draw it in layout. There are two main problems. One is how to place the input and output
Hi, I am layout the output buffer whcih drive a ~10pF load cap at 80MHz. The output buffer size is for PMOS 12/0.6,m=40 and for NMOS,it is 12/0.6, m=20. The max size of the W in my process is limited to Wmax=20. Anyone can see any risk for selction the multiple number is high to 40 for PMOS and 20 for NMOS? Thanks in adavnce for sharing th
hello Dsairaj kiran There are many tutorial avaible online .. every uni using cadence tool for layouts has a tutorial starting with an interver .. please refer those .. i can one example tutiorail please follow those steps .. u will get a better idea suresh
for the layout level, we can first get a NAND with 4 transistors(CMOS fab), and then we can get an AND gate by following an inverter with the NAND.
you can easily get six 600V rated mosfets that are rated for 30A. this is what you need as a minimum. a good rule of thumb is to figure out how much space you have available and just fill it with the biggest die you can fit and use max copper pours (not traces) for power carying tracks. at these power levels you most important part is layo
Select the Symbol in the schematic and query ie press Q to query the Properties it should display the W & L values , otherwise Check the usermanuals for the command to query, if you need to query in the layout check the Trstor layout , highlight the POLY layer to find
In physical layout, they can draw as many NMOS or CMOS they want to make sure the matching, But in logicwise 2 NOS or 2 PMOS parallel with same source and same drain are considered one.
I am just wondering why in many standard cell library in an inverter layout the gate is not straight rather like a snake. What is the advantage of this structure???
Hi to get equal rise/fall time, U can select size=Up/Un;to optimum power and performance, U may set the size below Up/Un segment big devices into small segment of less than 3u. This is critical to annotate in schematics so Parasitic extraction work correctly (more close to layout) in pre-layout simulations. regards
dear all We should layout a vco. the frequence is 1M. While layouting the vco. what sides should we take care? The signal path, or power path, and any others.
Hi fellow friends and professionals I am a final year student and have been shortlisted for an interview for VLSI layout engineer position next week. I have prepared on some topics; ?MOSFET characteristics, operations, cross sectional view ?Digital logic gates, multiplexers, boolean algebra, flip flops and latches ?RLC circuit, diode char
I have downloaded the following table from here mosis has given design rules. SCMOS layout Rules - Active Rule Description ------------------------------------- Lambda 2.1 Minimum width - -------------------------------------------- 3 2.2 Minimum spacing
Hi all, I'm planning to start the DRC, routing and LVS of a analog designed circuit. I have no experience in this field. What are the things to consider ? What do you advise me in order to obtain a nice layout apart of course the patience ? Thanks in advance.
Professional-product implemented- design of a TPSC divider by 2 in 065CMOS have been developed with a max freq of 6.2GHz (Design of Experiment -DOE- Post layout simulation) and measurements are in accordance with simulation. Take care: there could be a LARGE difference from schematic and layout simulations. layout is really critical, (...)
What will happen if the pmos is connect to vss and nmos to vdd in an inverter layout?