https://community.cadence.com/search?q=&category=forum&groups=25&Redirected=trueen-USTelligent Community 12https://community.cadence.com/cadence_technology_forums/f/custom-ic-skill/65847/i-have-a-very-important-problem-to-deal-with-point-list-by-using-dbpointarrayor/1408030Wed, 18 Mar 2026 14:12:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408030Andrew Beckett/cadence_technology_forums/f/custom-ic-skill/65847/i-have-a-very-important-problem-to-deal-with-point-list-by-using-dbpointarrayor/1408030It's not really clear what the problem is. The input point list of dbPointArrayOr() needs to be a list of point lists. So if each of A, B, C is a rectangle, that needs to be: (llx:lly urx:lly urx:ury llx:ury) (ll=lowerleft ur=upperight) for each rectangle. It cannot just be a normal bounding box (which is the (llx:lly urx:ury) as that's just a line with two points if describing a point list. I don't understand why you would want ( (A B C D) (E F G H) (H I J K) ) (where A, B C is formed as above) - because that's not what the function would be expecting. The dbPointArrayOr wouldn't need the points to be structured like that to merge them (in fact it would fail because it wouldn't expect them like that). The set of point lists for each polygon representing the rectangles can be in any order. If you have 12 point lists (each with the four corners of the rectangles) and then you call dbPointArrayOr, you should get a list of 3 point lists back. Maybe seeing your code and some real example data would clarify things? Andrewhttps://community.cadence.com/cadence_technology_forums/f/custom-ic-skill/65847/i-have-a-very-important-problem-to-deal-with-point-list-by-using-dbpointarrayorWed, 18 Mar 2026 13:49:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:65847Noobnoob/cadence_technology_forums/f/custom-ic-skill/65847/i-have-a-very-important-problem-to-deal-with-point-list-by-using-dbpointarrayor1I'm sorry for my english skill... i hope that you can undetstand my thinking... For example, i made a cell and called it "CAP" CAP is made of four poly layer db and four diffusion layer db. and then, i placed CAP by using mosaics (rows:0 columns:1) and 1 instances. currently, i placed three CAPs in Layout window. First, i used dbGetTrueOverlaps() function in order to get db of poly layers in Layout window. [ ex : overlaps = dbGetTrueOverlaps(wcv wcv ~> bBox list("Poly" "drawing") 32 t ) ] overlaps has twelve poly layer db and path of poly layers. Second, i got pure twelve poly layer db by using your help and saved these in "poly_list" variable. poly_list has twelve poly layer db! Three, i transformed each poly layer db's bbox coordinate into top level coordinate! and saved these in "bbox_list" variable. Four, i transformed bbox coordinate into point coordinate in order to use dbPointArrayOr() !! and these in "point_list" variable. Currently, i have point coordinates of twelve poly layer db. and then, i used dbPointArrayOr() to merge points of poly layer dbs. But!!! I failed in merging points... i think that cause of fail is "point_list" variable!! To be accurate, I'm sure that "overlaps" "bbox_list" have twelve poly layer db is problem... Presently, bbox_list = ( A B C D E F G H I J K ) [alphabet is each poly layer's bbox coordirnate] but, as i want, in order to merge point list I think that bbox_list = ( (A B C D) (E F G H) (H I J K) ) Later, i will post my skill script to explain what i think in detail. How can i divide 12 poly layer dbs into 3 portion?? How can i divide 12 bbox coordinates into 3 portion?? thank you for reading my post.https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code/1408027Wed, 18 Mar 2026 10:24:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408027RA20250218276/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code/1408027Exactly what I needed. Thank you.https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65390/query-regarding-virtuoso-emx-tool/1408025Tue, 17 Mar 2026 12:29:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408025jtorres98/cadence_technology_forums/f/custom-ic-design/65390/query-regarding-virtuoso-emx-tool/1408025Hi, Have you been able to fix the issue yet? I'm having the same issue and I haven't been able to fix it yet.https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code/1408022Tue, 17 Mar 2026 10:35:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408022Andrew Beckett/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code/1408022Here's the plot:https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code/1408021Tue, 17 Mar 2026 10:30:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408021Andrew Beckett/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code/1408021A better solution (given that this is thermometer encoded) might be a simple VerilogA model. This will do what you want: // VerilogA for mylib, thermdc, veriloga `include "constants.vams" `include "disciplines.vams" `define thermMax 63 module thermdc(out,ref); electrical [0: `thermMax ] out; electrical ref; output [0: `thermMax ] out; inout ref; parameter integer code=0; parameter vhi=1.2; parameter vlo=0.0; genvar bit; analog begin for (bit=0; bit bit) V(out[bit],ref) <+ vhi; else V(out[bit],ref) <+ vlo; end end endmodule You can then (when creating the view in Virtuoso) create a symbol. I then instantiated this, set a design variable on the code parameter (I called it CODE) and then swept that in ADE - here's part of the waveforms being shown (having problems uploading the image - will try a different route) Andrewhttps://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code/1408020Tue, 17 Mar 2026 10:00:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408020Frank Wiedmann/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code/1408020You might want to take a look at https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000000nX1lEAE and https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1O3w000009lnUWEAY (which show how to realize binary code).https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-codeTue, 17 Mar 2026 06:52:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:65842RA20250218276/cadence_technology_forums/f/custom-ic-design/65842/transient-simulation-sweep-for-thermometer-code4I need to do transient simulation for thermometer code input. Currently, I have 64 voltage sources and change the values one by one. I am sure there are other ways to do this efficiently. In short, I am looking for a way to pack these Q63 to Q0 as a design variable so I can sweep it using parametric analysis. I am using ADE L and IC618.https://community.cadence.com/cadence_technology_forums/f/custom-ic-skill/65837/hi-is-there-any-way-to-compute-bbox-of-2-bboxes/1408015Mon, 16 Mar 2026 07:28:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408015p94todorov/cadence_technology_forums/f/custom-ic-skill/65837/hi-is-there-any-way-to-compute-bbox-of-2-bboxes/1408015Hi, To find the bounding bBox of multiple bBoxes I usually use something like this: putd('ptMergeBBoxes lambda((bBoxList "l") list( apply('min mapcar('caar bBoxList)):apply('min mapcar('cadar bBoxList)) apply('max mapcar('caadr bBoxList)):apply('max mapcar('cadadr bBoxList)) );list );lambda );putd Regards, Petarhttps://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65838/harmonic-balance-not-matching-transient-with-harm_tunerSun, 15 Mar 2026 19:33:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:65838BT202409301339/cadence_technology_forums/f/custom-ic-design/65838/harmonic-balance-not-matching-transient-with-harm_tuner0I have been experimenting with the new load pull functionality using the harm_tuner component, and am quite confused about some results. I am seeing dramatically different results from the hb sim vs when I do a transient simulation with the tuner in place to sanity check, or similarly check the tstab waveforms. Harmonic balance shows several orders of magnitude larger power than I see in transient. In an effort to debug this in a simpler setup I made the following testbench, which shows somewhat similar behavior. The idea is that the tuners convert from 50 Ohms to some lower impedance, but are matched to each-other so all input power should show up at the output. Both ports are 50 Ohms. Port1 is driving a 10 GHz 0 dBm tone. The source/load tuners are configured identically: A sp sim shows s11=s22=0 (linear), and s12=s21=1 (also linear), as I would expect. hb shows 1 mW tone power at the output port, as I'd expect. This shows up in both the spectrum and time views. (spectrum shown below) Unfortunately the forum isn't letting me upload more images for some reason, ("an error occurred. Please try again or contact your administrator") but the time sweep view of the hb results shows a 0.63 Vpp waveform at both ports, which matches 0 dBm. However, the hb tstab waveforms show something else. These show a 240 mVpp waveform at the output port and 390 mVpp waveform at the input port. Neither of these match the harmonic balance result! The same is observed for a transient simulation. I wish I could upload more images to illustrate this, but the waveforms seem to be settled. So, am I missing something here? Does harm_tuner not work for transient, but somehow does work for harmonic balance, or is something else going on? I understand the nature of harm_tuner will give some weird transients, but the apparently settled behavior for a single tone in transient sim does not seem correct, but then harmonic balance does seem right. I am hoping I can trust the hb results.. I am using IC25.1-64b.38 and Spectre 25.1.0.274.isr6https://community.cadence.com/cadence_technology_forums/f/custom-ic-skill/65837/hi-is-there-any-way-to-compute-bbox-of-2-bboxesSat, 14 Mar 2026 18:26:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:65837GB20250109498/cadence_technology_forums/f/custom-ic-skill/65837/hi-is-there-any-way-to-compute-bbox-of-2-bboxes1https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorer/1408007Fri, 13 Mar 2026 09:26:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408007Andrew Beckett/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorer/1408007[quote userid="850983" url="~/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorer/1408005"]Where can I find the SPECTRE24.1/25.1 hotfix? (I'm new to the forum)[/quote] http://downloads.cadence.com This is where releases (including hot fixes) can be downloaded and installed. Whoever is responsible for your software installations should know how to do this, hopefully! Regards, Andrewhttps://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorer/1408005Fri, 13 Mar 2026 08:45:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408005FZ20251125769/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorer/1408005Hi Andrew! Thanks for the response. Where can I find the SPECTRE24.1/25.1 hotfix? (I'm new to the forum)https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorer/1408004Fri, 13 Mar 2026 06:20:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408004Andrew Beckett/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorer/1408004Please try again using the latest SPECTRE24.1 or SPECTRE25.1 hotfix and if the crash still appears, you should contact customer support (use the case menu to submit a case after logging in) This will almost certainly need the netlist and for us to obtain the models used to ensure that we can reproduce the problem.https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65814/significant-digits-in-ade-assembler-output-expressions/1408003Fri, 13 Mar 2026 04:24:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408003an wx/cadence_technology_forums/f/custom-ic-design/65814/significant-digits-in-ade-assembler-output-expressions/1408003Thank you Andrew very much! That works well.https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorerThu, 12 Mar 2026 19:06:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:65833FZ20251125769/cadence_technology_forums/f/custom-ic-design/65833/problems-with-virtuoso-ade-explorer3Hi! I've been trying to run a simulation in ADE Explorer or ADE Assembler and I get this error every time: Spectre (R) Circuit Simulator Version 24.1.0.078 64bit -- 14 Sep 2024 Copyright (C) 1989-2024 Cadence Design Systems, Inc. All rights reserved worldwide. Cadence and Spectre are registered trademarks of Cadence Design Systems, Inc. All others are the property of their respective holders. Includes RSA BSAFE(R) Cryptographic or Security Protocol Software from RSA Security, Inc. User: fzapata Host: cadence HostID: E70A569B PID: 4708 Memory available: 23.4371 GB physical: 24.4112 GB Linux : AlmaLinux release 8.10 (Cerulean Leopard) CPU Type: AMD Ryzen 7 6800H with Radeon Graphics Socket: Processors [Frequency] (Hyperthreaded Processor) 0: 0 [2221.5] (), 1 [1095.8] (), 2 [1992.9] (), 3 [1095.8] (), 4 [4442.4] () 5 [1095.8] (), 6 [3344.5] (), 7 [1095.8] (), 8 [2301.2] (), 9 [1095.8] () 10 [3414.2] (), 11 [1095.8] (), 12 [1971.6] (), 13 [1095.8] (), 14 [1095.8] () 15 [1964.4] () System load averages (1min, 5min, 15min) : 2.8 %, 2.1 %, 1.9 % Hyperthreading is enabled Simulating `input.scs' on cadence at 6:47:47 PM, Thur Mar 12, 2026 (process id: 4708). Current working directory: /home/fzapata/simulation/twork_1/netlist Command line: /opt/cadence/SPECTRE241/tools.lnx86/bin/spectre -64 input.scs \ +escchars +log ../psf/spectre.out -format psfxl -raw ../psf \ +lqtimeout 900 -maxw 5 -maxn 5 -env ade \ +adespetkn= (long number here) \ -ahdllibdir \ /home/fzapata/simulation/tp_final/capacitances_calculation/maestro/results/maestro/Interactive.0/sharedData/CDS/ahdl/input.ahdlSimDB \ +logstatus Simulation Id: ktuVgaS28d6R6sO3 Licensing Information: [18:47:48.346113] Configured Lic search path (24.01-s002): 2100@localhost Internal error found in spectre during license check-out. FATAL (SPECTRE-18): Segmentation fault. Encountered a critical error during simulation. Run `mmsimpack' (see mmsimpack -h for detailed usage information) to package the netlist and log files as a compressed tar file. Then, contact your Cadence representative or submit a service request via Cadence Online Support, including the tar file and any other information that could help identify the problem. Encountered a critical error during simulation. Run `mmsimpack' (see mmsimpack -h for detailed usage information) to package the netlist and log files as a compressed tar file. Then, contact your Cadence representative or submit a service request via Cadence Online Support, including the tar file and any other information that could help identify the problem. Version 24.1.0.078 64bit -- 14 Sep 2024 ****ASSERTION STACK**** 0x7ebf63c 0xabaf5c 0xabb512 0x65450612990 0x6544184e5af 0x65441821ee5 0x6544188f887 0x65441896b8c 0x6544189be8a 0x6543c046836 0x6543c02956c 0x6543c01b360 0x6543c01b7f7 0x6543c016bdf 0x6543c017023 0x6543c0172d0 0x90cb895 0x90cbd19 0x90846c7 0x9084486 0x9072fbf 0x906b9e1 0x906d613 0x9068a49 0x9068bab 0x8bcab36 0x8bbea3a 0x8bbe24b 0x8bbfd8a 0x8bcb8aa 0xba321c 0xba67b4 ****LIBRARIES**** spectre/bin/64bit/spectre [0x400000] /usr/lib64/libpthread.so.0 [0x65450600000] /lib64/libc.so.6 [0x65441800000] /lib64/libudev.so.1 [0x6543c000000]https://community.cadence.com/cadence_technology_forums/f/custom-ic-skill/65830/change-instance-name-prefixes-automatically/1408002Thu, 12 Mar 2026 17:41:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408002Andrew Beckett/cadence_technology_forums/f/custom-ic-skill/65830/change-instance-name-prefixes-automatically/1408002Martin, This code (that I threw together, so not especially polished) can do this easily enough: procedure(CCFrenameInsts(@key (cv geGetEditCellView()) cellPattern fromPattern replacement "gttt") let(( (cellPat pcreCompile(cellPattern)) (fromPat pcreCompile(fromPattern)) instName changed ) foreach(inst cv~>instances when(pcreExecute(cellPat inst~>cellName) instName=pcreReplace(fromPat inst~>name replacement 1) unless(inst~>name==instName inst~>name=instName changed=t ) ) ) changed ) ) You'd use it like this: CCFrenameInsts(?cellPattern "^nch" ?fromPattern "^MN?" ?replacement "N") The ?cellPattern is a regular expression for the matching cell names (i.e. begins with nch); the ?fromPattern is a regular expression for matching instance names (begins with M, followed by 0 or 1 N) and the replacement is what you want that part of the instance name to be replaced with. Andrewhttps://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65709/two-tone-harmonic-balance-noise-settings-relative-harmonic-and-reference-side-band/1408000Thu, 12 Mar 2026 15:48:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1408000YX202508199356/cadence_technology_forums/f/custom-ic-design/65709/two-tone-harmonic-balance-noise-settings-relative-harmonic-and-reference-side-band/1408000Thanks again, Andrew. So, the "frequency shift" is the output frequency range you want to sweep across, and the index [1 0] follows the fundamental tone settings in HB, i.e., the 1st (large, in my case, the LO signal) tone, and 2nd tone. +1 = upper sideband, -1 = lower sideband. Got it.https://community.cadence.com/cadence_technology_forums/f/custom-ic-skill/65830/change-instance-name-prefixes-automaticallyThu, 12 Mar 2026 15:12:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:65830MF202512032436/cadence_technology_forums/f/custom-ic-skill/65830/change-instance-name-prefixes-automatically1Hi all, I would like to change all instance name prefixes for a group of cells placed in a schematic: Example: All cells with the cell-name starting with "nch" (so n-MOS devices) should have the instance name prefix "N". The old prefix M or MN should be removed. Thanks for your help Martinhttps://community.cadence.com/cadence_technology_forums/f/custom-ic-design/65826/standard-deviation-summary-in-monte-carlo-simulations-across-multiple-corners/1407997Thu, 12 Mar 2026 08:15:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:1407997alho1/cadence_technology_forums/f/custom-ic-design/65826/standard-deviation-summary-in-monte-carlo-simulations-across-multiple-corners/1407997Hi Andrew, thanks for looking into this. Regards, Alexander