I have upgraded to IC 615 from IC 613. But I am facing problems:
1. In spectre RF when I do s parameter simulation and try to plot gain circles (Ga,Gp etc) I get nothing. Noise circles work well. I can plot the gain curves wrt frequency though which shows data is available.
2. When I plot voltage conversion gain using pac then I get bar plot by default instead of solid line curve. Also in some plots I get in powers of ten form. How can I customize the plot?
In the techParams section of my techfile, there are variables called "metal1_layer", "metal2_layer", ect, all set to the layer and pourpose pairs that show up in the LSW.
Is there a way to get the layer name from the "metal2_layer" variable in the compiled techfile? I would like to test to see if it is set, and if it is set obtain the name.
I have a script that places the pin in the appropiate place according to the lower pin place.
When I bring the pins in through VXL the pins are rectangle and the pin in the lower cell is a polygon. The script creates a polygon pin in the correct place, but I would like to keep the original pin name. I delete the original pin then try to rename to the old pin, but I get the error the original pin name already exists.
How do I purge the original name so I can rename the new pin name to the old?
Paul
I have a large number of shapes that I need to remove from the layout. I find that the delete command seems to take exponenentially increasing amounts of time to run as the number of shapes selected goes up. This creates the perverse situation where it is significantly faster to repeatedly select smaller groups and hit delete than to select them all at once and hit delete. Here's an example:
(note: delete here is the leHiDelete() )
Select 29,000 objects all at once and hit delete -> ~81 seconds
Manually select a few thousand at a time and delete until all 29,000 are gone -> 22 seconds
That's a huge difference since the 22 seconds includes all the time it takes for me to drag the mouse around in between delete commands. This gets worse the more objects are selected. Is there a more efficient way to do this? I tried writing a recursive delete function that breaks up large lists into smaller ones before deleting, but it doesn't seem to yield any speed improvement:
;; delete alias, speeds up deleting thousands of shapes
procedure( myDelete(@optional objects)
if(objects == nil
objects = geGetSelSet()
);if
cond(
(objects == nil leHiDelete())
(length(objects) < 1000 leHiDelete())
(t
info("splitting list of length %d\n" length(objects))
b = copy(nthcdr(length(objects)/2 objects))
rplacd(nthcdr(length(objects)/2-1 objects) nil)
a = copy(objects)
myDelete(a)
myDelete(b)
)
);cond
)
We are using Cadence 16.5 & I want to create custom menu for our CAD group.
First I added menu in allegro.men (...folder\share\pcb\text\cuimenus),
POPUP "&CAD Menu"
BEGIN
MENUITEM "&Bead Probe", "BeadProbe.il"
MENUITEM "set_refdes.il", "srd save"
END
I even added load("BeadProbe.il") and load("set_refdes.il") in allegro.ilinit
second, copy the Skill files to this location C:\Cadence\setup\pcbenv\skill
Now, when I open the database it loaded the CAD Menu, but when I select the command it show.
E- Command not found "srd save"
I tried both of the command and none of them is working.
Any advice would be greatly appreciated
When netlisting from Design Entry CIS for the PCB editor, the dialog box is drawn with the right side of the box including the browse button for the Netlist Files Directory obscured. It's a major painto have to type an absolute path into the box which not coincidentally doesn't show the whole path. Resizing the window does not cure the issue, nor does changing tabs to try to force the window to redraw. Another consequence is that the radio button label for Place Change Components Never is obscured in the same manner.
This is a new behavior since installing 16.6 on Win7 64 bit.
Is this a known problem?
The screenshot below shows the result after dragging the window wider.
Have a question about PCB antenna in schematic.
I am doing a design which include a bluetooth PCB antenna.This pcb antenna is only a trace. I am wondering should I put a schematic symbol of antenna in schematic, and then make a footprint of PCB antenna? Or leaving it along in schematic, and routing a trace of antenna in PCB layout? Which is the right way to do?
By the way, how to draw a trace in PCB layout, WITHOUT solder mask ? I want run a trace, with original color.
Thanks
hi,
i'm simuliting a circuit, where i connect 4 switching caps to the port, than i run a psp annalysis to get the input impedance"Z11", and i want to know how spectre do to give such result, it's for helping me understandind how the input impedance behave.
I'm using Virtuoso 6.1.5.
I downloaded a PSPICE model from a supplier.
However, it doesn't work because of syntax.
Could you give some advices to solve my problem?
(For the confidential reason, I have masked the specific number)
simulator lang=spice
.SUBCKT model 20 10 30 Rg 10 1 1 M1 2 1 3 3 DMOS L=XX W=XX .MODEL DMOS NMOS (VTO={X.XX*{-X.XXX*TEMP+X.XXX}} KP={XX.X*{X.XXXX*TEMP+X.XXXX}} + THETA=X.XXX VMAX=X.XXX LEVEL=3) Cgs 1 3 XXXp Rd 20 4 XXm TC=X.XXXX Dds 3 4 DDS .MODEL DDS D(BV={XXX*{X.XXXX*TEMP+X.XXX}} M=X.X CJO=XXXp VJ=X.X) Dbody 3 20 DBODY .MODEL DBODY D(IS=X.X N=X RS=Xm EG=X TT=XX) Ra 4 2 XX TC=XXX Rs 3 5 XXX Ls 5 30 XXX M2 1 8 6 6 INTER E2 8 6 4 1 2 .MODEL INTER NMOS(VTO=X KP=XX LEVEL=1) Cgdmax 7 4 XXXX Rcgd 7 4 XXX Dgd 6 4 DGD Rdgd 4 6 XXXX .MODEL DGD D(M=XXX CJO=XXXX VJ=XXX) M3 7 9 1 1 INTER E3 9 1 4 1 -2
.ENDS model
simulator lang=spectre
I'm generating a netlist from CIW using:
simulator('spectre)
design("libName" "cellName" "viewName")
createNetlist()
This works fine but I would like to enclose the top level cell in .subckt/ends statements, similar to other cells in the hierarchy. Is that possible using the skill/ocean interface?
Thanks,
--Tavi
Hello, I'm new to Cadence, coming from Altium. I'm using Allegro Design Entry HDL and PCB Editor, rev 16.3.
As part of the new design and "new to designing with Cadence" process, I am creating parts for our library and I'm having some trouble with a TI SON part that includes a thermal pad or power pad. Here is a snap shot from the TPS6120:
At this point, I've made the pads in the padstack editor (but made them rectangles since I didn't know how to make it a rect at one end and rounded at the other) and used the symbol creation wizard to make a SOIC. To make the thermal pad I placed a filled polygon on the Etch/top layer and it is one large pad with the outline like above.
Question: How do turn my filled polygon into a ground pin (or should I not?) and how do I add the soldermask layer to something I've drawn like this?
Question: How do I add vias to my footprint? My plan was to create the via in the padstack editor then place them in the appropriate places but I have some confusion as to whether the pad/via structure is just supposed to sit there dangling or if it should be assigned a pin # (ground).
I did search the forum and came across the thread Thermal Pad Shape with Vias In it a poster mentions that he makes these pads using multiple surface mount style pins. I think I can figure out how to do this but I'd appreciate any tips on setting up the tools and pads so that things are properly done.
Picture of the pad made from pins:
Hi,
I'm using OrCAD PCB Designer and have created differential pairs. When I manually route the pair, the gap between traces is always zero no matter what I set the gap to in the contraints manager. I'm fairly new to this tool so I'm getting a littel frustrated why it does this. I even found another posting that some provided a .brd design with a diff pair and its own CM settings. When I deleted the traces to then reroute them, I found the same problem, the trace gap went to zero! Is this a license limitation or am I missing something? I've created CSet spacing parameters in the CM.
Thanks for any help that someone might be able to provide.
-KC
Hi Guys
I am trying to simulate MAX9643U and EL7202 (using their Pspice models) as a part of my design, in Virtuoso. While I have reviewed many similar problems and solutions in this informative website, I still can not overcome the errors.
1) MAX9643U
(the model is available here:
http://www.maximintegrated.com/design/tools/modeling-simulation/spice/current-sense-amps/orcad/MAX9643U.LIB)
The problem points to the line:
Fi+ RS+ GND VALUE={-I(Vi+)+20.02u}I read in one of the posts that I have replace {} by ''. but the error still exists and says:
"Expected 1 controlling voltage sources, but found 0"
2) EL7202
(the model is available here:
http://www.intersil.com/content/dam/Intersil/documents/el72/el7202.txt)
The problem (I guess) is related to the lines below:
.model spmod vswitch ron=3 roff=2meg von=1 voff=1.5
.model snmod vswitch ron=4 roff=2meg von=3 voff=2
e1 out vss table {(v(inp)-v(inm))*5000} = (0,0) (3.2,3.2)and the error says:
"Error (CMI-2078): I1016.sn: Required parameter 'file' is missing"
"Error (CMI-2078): I1016.sp: Required parameter 'file' is missing"
Any comment is highly appreciated, in advance
Politekniko
Can anyone explain me how to use use the regular expression in skill programming........
I'm geeting many info from cadence from that I want only PMOS and NMOS information from this command geGetEditCellView()~>instances~>cellName
Result is ("N_18_MM" "N_18_MM" "N_18_MM" "opin" "ipin" "ipin" "ipin" "ipin" "ipin" "ipin""ipin" "P_18_MM" "P_18_MM" "P_18_MM")
From this I want only "N_18_MM" &"P_18_MM" info
Hi,
How to open a layout view in GUI mode using skill code? I want to open a cell layout view in XL mode.
dbOpenCellViewByType will open the cell in background with specified library, cell name and mode, but how to open in GUI mode??
Regards,
Santhosh
Hi all,
I've just tried OrCad 16.6 lite version. I used capture cis to design a simple circuit, but I wasn't able to run Pspice because the assosiated toolbar was unabled.
Can anyone help to this?
Thanks in advance.
Just a repetitive problem I'm having. My Win7 64-bit PC and IE10 will not let me log-in to the Cadence forum. No errors, block notices or anything. It just won't do it. Log-in attempts spend a few secs "waiting circle" and then return me to the login screen.
Chrome on the other had has no problem from the same PC (i.e. I'm here now).
Anyone got any Microsoft clues?
Regards,
Hi guys, yesterday when I ran the command of 'automatic router ' in PCB Editor, the message ' specctra quit unexpectedly with an exit code of 5 ' was shown on the screen and I was confused , because I never seen it before.
Then I looked the Specctra Log file and there are several error message shown below:
# <<WARNING:>> Potential non fixed positive shape alignment with the host CAD system exists.
# Allegro PCB Router does not perform any operations to remove or identify slivers and isolations.
# If the host CAD system performs such an operation, the user may experience unrouted
# or DRC alignment issues.
# The user must perform final unrouted/DRC validation within the host CAD system.
# <<ERROR:>> Error in file D:/BIT work/MB7K01/PCB\MB7K01.dsn, line 19668: token 5 = Orphan_net
# (content): (wire (net Orphan_net) (type route))
# <<ERROR:>> Parser: Unrecognized token net while parsing shape
I have no idea about " line 19668: token 5 = Orphan_net "
Can anyone help me to solve it please?
Thank you very much!
Dear SKILL experts
I tried to write a SKILL function that shows a form created by hiCreateAppForm() on the screen and blocks execution until the form is removed from the screen by the user with a OK or Cancel.
In the form I have a listBoxField. The user selects ONE item in the listBox. When OK is pressed the SKILL function that showed the form returns the selected item, when Cancel was selected the function returns nil.
I tried the argument: ?dialogStyle 'modal but the form does not block the execution.
The code is in one SKILL file that I load but the execution of the SKILL statements in the file is not blocked while the form is on the screen.
Here is the code:
file listBox.il:
; Create the application form
hiCreateAppForm(
?name 'VARselectListForm
?formTitle "Title"
?dialogStyle 'modal
?initialSize t
?buttonLayout 'OKCancel
?fields list(
list(
hiCreateListBoxField(
?name 'VARselectListFormListBox
?choices nil
?value nil
?prompt "Nodes"
) ; hiCreateListBoxField
list(0 0)
list(150 400)
50
) ; list
) ; list
) ; hiCreateAppForm
procedure(SHOWselectListBoxForm(title choices)
when(and(boundp('VARselectListForm)
hiIsForm(VARselectListForm))
VARselectListForm->title = title
VARselectListForm->VARselectListFormListBox->choices=choices
hiDisplayForm(VARselectListForm)
VARselectListForm->VARselectListFormListBox->value
) ; when
) ; SHOWselectListBoxForm
And the the file that uses this:
load("listBox.il")
choices = '("aaa" "bbb" "ccc" "ddd" "eee")
title = "Form title"
printf("Before the box\n")
choice = SHOWselectListBoxForm(title choices)
printf("After the box: %L\n" choice)
The message After the box............. already appears while the form is on the screen.
I want a blocking solution. The dialog style systemModal is gone.
Of course I can make a wait loop with global variables, but is there a better way?
Hans Kok