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Next-Generation standard layout Viewer LAVIS is a next generation layout viewer to support large scale data, super high-speed display and multi format. With LSI designs becoming increasingly detailed, the volume of design data is rapidly expanding. Speeding up data display and standardizing data vi
hi all, i'm actually doing a project that includes the 3-8 decoder. while some of u think a 3-8 decoder has a simple schematic with the standard truth table, which schematic should be
AFAIK there's no difference to standard layout: the bumping service is done afterwards: 20..25?m isolation layer over the passivation, window etching down to the pads, bump metalization by electro-plating, (flip chip bonding). Each bonding pad needs an ESD structure which can stand the necessary electro-plating current (10..50mA).
Look here: or just type this into google: "standard atmosphere formula" Without the quotes and you will many more links. best regards
Like any FF, It depends on its' truth table for its' function. Usually D-FF's are clocked. The main thing is the output usually follows the input after its' clocked. A standard truth table is... D__Q__|Q+1 (output) --------------- 0__0____0 0__1____0 1__0____1 1__1____1 As you can see, If D is high Q+1 (the +1 = after clock) (...)
can you express clearly? gds2 is one standard layout format, normally LVS is compare layout and schemetic DRC is design rule check for layout
Hi GDSII is a standard for layout file. regards
i am currently using Orcad 9.1 version Its a standard 100-pin PQFP Package. You shouldn't need to make a custom footprint. The footprint for the 100-pin PQFP should be in a standard layout library QUAD.llb
HI, Atul: Her is an IE3DLibrary project with the patch radius as a tuning variable. You can modify the model with the inset feed's dimensions as tuning variables. It is hard to define the tuning variables in the standard layout editor MGRID while you can achieve it easily using IE3DLibrary. Best regards,
Sometimes you need to flatten a PCELL in order to edit it to fit in an odd shape. PCELLs are the standard layout views that you instance from your technology library. For instance, if you instance a PMOS from your library, you are unable to edit the shape of the cell. Flattening is often used in digital design where you would like to minimise the s
This is not symbol from standard ASCII table. Check Your regional/code page!
Hi, thanks for all the information . I am trying to study and understand the cable size to current carrying capacity table but it seems that different readings are given by different sites. Is there a standard /fixed table?
Your datasheet shows a straight-line for Characterstics curve. Straight line has equation y=mx+c slope (Δy/Δx) = (2.970-0.990)/(90-30) = 0.033 // from standard characterstics table. so, m=0.033 check with substitutions, x=30, y=0.990 0.990=(0.033)(30)+c c = 0 x=90 y=2.970 2.970=(0.033)(90)+c c = 0 Both of passing throu
Hi, I am a beginner in standard cel layout.I have observed the presence of Tap but not sure of its purpose.Can anyone letme know the importance of tap.Would appreciate if the purpose of other layers such as metal,poly,active region,contact,via is explained. Waiting for a reply. Thanks in advance ukint
Hi, Really strange question. A mos is a 4 terminals devices: gate, drain, source and bulk. What we call "tap" in layout is the bulk connection. It's for that you always have substrate tie and nwell tie in a standard cell. As the others reply you need to go back or simply go to the basics to understand why a mos is a 4 terminals devices. Fr
hi actually there are some guide lines provided by mosis foundary for design of standard cells in sub micron technologies you can find the document in>design flows hope this helps
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???
hai frnds. how to design standard cell layout.any one send material for that
hello everybody Is there a layout tool to pass from standard form to real form ? Because i work with TANNER, so i have only the standard form layout (Example:rectangle poly and rectangle diff).But in rality when we concept a circuit, the form is not rectangle. Thanks for help Fasto
Hello, I am in the process of creating a set of standard cells to be used in larger designs. I currently have the spice netlist models of these cells, and have performed library characterization to generate the .lib and .db library files. Now, I would like to generate the layout of these cells, hopefully without having to manually lay out ev
Hi, I am planning to do some custom digital cells which I want to use in auto place and route along with the Faraday standard cell library. I have got some idea from the document "FSC0G_D_Library_PR_layout_Guide_v1.0.pdf"(attached) for 130nm standard cell place and route. It will be very helpful if I can get access to the (...)
I'm working on a control for a humidifier. As per UL standard UL998 a spacing of 6.4mm is required. I'm doing the PCB layout. "The spacings between wiring terminals of opposite polarity, between a wiring terminal and an uninsulated non-current-carrying metal part, or between a wiring terminal and uninsulated live part of opposite polarity shal
Hi all. For a certain reason the layout of a synthesized digital block was done with VCAR in virtuoso (and not with Encounter).Now I have done a post-layout fix using ECO which has generated a new verilog netlist and would like to apply the fix on layout working on Encounter. As it is a post-layout fix and cells cannot be (...)
There is no "standard". Depends on stackup. As for UART: TX and RX do not form a differential pair, rather the contrary.
actually i want to study all aspects of standard cell layout design like tracks, pitch, grid, high performance, high density etc, so please suggest me some suitable docs or links.. thanks in advance
Is there any standard for exchange of analog IPs?
The libraries are third party supplied and not supported by TI in any way. I may not be alone, but I prefer to make my own library parts and use a standard for building them up and layer assignments etc. Third party libraries are OK, but i do not know any professional PCB designer that was ever happy with a standard footprint :D
This may be old news but ORCAD does contain this package in it's standard library. Library SOG SOG.50M/40/WG20.20/L10.60 You have to look it up in the book called, "Orcad layout Footprint Libraries". The book can be found posted in another forum. Pretty much all packages, (unless a custom part), can be found in Orcad. The problem is sea
I think the actual release of the PC Card (=PCMCIA) standard is v8.0 ? So is it an old version you are looking for ? btw: you can do download v7.0 in MCU fileman: Specifications/PC Card standard for v8.0 see here: Mik
Hi gentle_man & khouly, so u mean to say that first i convert the VHDL code to gate level using a tool like leonardo. then use place & route tool of the vlsi layout software to get the required layout? also the cell library which u mentioned. i use tan*ner l-edit, s-edit ,etc. we have a standard cell library in school. would these be (...)
AWG table AWG=American Wire Gauge standard Gauge Diam Area R I at 3A/mm2 AWG mm mm2 ohm/km mA 46 0,04 0,0013 13700 3,8 44 0,05 0,0020 8750 6 42 0,06 0,0028 6070 9 41 0,07 0,0039 4460 12 40 0,08 0,0050 3420 15 39 0,09 0,0064 2700 19 38 0,10 0,0078 2190 24 37 0,11 0,0095 1810 28 0,12 0,011
You must have it in the build-in library, if you have installed the completet product. Any way if you are working with non-standard component it is better to design padstack by yourself.
do any one know how change the layout file in Virvtuoso to others file type like .jpg or .gif ? thx for ur help!!!!
has anyone here ever used the standard cells in tsmc libraries in high speed designs? tsmc libraries are characterized for a top speed of around 600 mhz but realistically these cells can run much faster some libraries can even run twice as fast as the rated speed. the trick is to simulate and check timing by some other method such as spice simulati
I understand that STA before P&R is meant to highlight the crtical paths of the design for corrective actions and also give an estimation of the delays. These delays are formulated through the accounting of standard cell delays and wire delays. However, how is post layout STA different form this. Is it because of the addition of buffers in the C
let me add one more question...what are the important things to be kept in mind while laying out of standard cells...
that is interesting to me - i don't do digital. (in fact, i think you are in the wrong forum, but who cares!) are you saying that synopsis can route a standard cell layout from vhdl? i used a free program called electric which can channel route standard cells from STRUCTURAL vhdl, but cannot convert behavioral vhdl into structural. (...)
Detailled information maybe found in this book : "High Voltage Devices and Circuits in standard Cmos Technologies" by Hussein Ballan, Michel Declercq
GDS file is standard of industry. You can import to L_edit the GDS file out put from Cadence, but the technolgy table of Ldedit have to set the same as Cadence (layer number, Layer name, color...) have to be the same, so the look will be the same
Are the anyone can tell me , how to define and use Blind and buried vias in layout plus? Thanks!
If so, you probably have some mistakes to generate layout and the L and W sizes are not equal in schematic & layout. If you use standard cells, i think so, don't forget to extract SDF (standard delay format) for the cells and simulate the design extracted from layout based on it. I (...)
The should be connected as schematic required. But in standard CMOS technology, the bulk terminas of either N or P mosfets (usually N) cannot be connected to different potential. In layout, the bulk should be as close as to the source. For large current devices, use guarding to prevent latch-up. The source and drain are usually interchangea
what is the standard ratio between pad size and pin dimensions for smd components ? regards
first select the software you are going to use, in normal there will be some standard library avalible, you can use it for reference. regards binu g
If you meant device noise, you want to use standard geometry devices as they are well described by spice model. This is what's model for. If you deviate from the common geometry, the model becomes incorrect. Then you might or might not get some noise advantage, but all your currents, voltages, gm, etc are not modeled also. You are in completely unk
Hello, I am using VSdir standcell to build a programmable divider for frequency synthesizer. The VCO clock is around 1GHz. I constructed the schematic using symbols from the library. Now I need to layout the design (by which I mean connecting the standard cells as the cells are already laid out) . I have 2 choices: use Cadence First Enco
Hello Everyone, I need to choose a precise a value of resistor from the datasheet of a vendor. That vendor has provided the resistor range with % tolerance. I need to choose an exact value but somehow the detail table is missing, especially for 2% tolerance. Can anyone provide me with details. Thanks in advance. Chanchg
well i'm facing problems with layout designing. tools i'm using: microwind / electric (is there any other free tool for win32 except magic!) some how able to design standard cell design, but could not able to design alus/adders/shifter using datapath approach... need refs/links related datapath layout (and other (...)
Please get the info's from standard design rules for Rigid boards from IPC
Hi, Could somebody explain me clearly how to export an inductor layout from Momentum to Cadence Virtuoso? I generated a gds2 file in Momentum and tried to import it in Cadence. After importing the file, the Cadence reports that the import was successful. However, I can't see the inductor (actually nothing) when I open the layout. I suppose that