Open Issues: Difference between revisions
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==AMI (ON Semi) 0.5u tech library inconsistency - temperature coefficient== | ==AMI (ON Semi) 0.5u tech library inconsistency - temperature coefficient== | ||
===Problem=== | ===Problem=== | ||
It has been observed that the BSIM3 parameter ''ute'' is assigned a value in the default tech library which does not match the [https://www.mosis.com/pages/Technical/Testdata/ami-c5-prm | It has been observed that the BSIM3 parameter ''ute'' is assigned a value in the default tech library which does not match the [https://www.mosis.com/pages/Technical/Testdata/ami-c5-prm test data] available on the MOSIS website. The value in almost all of the test runs is -1.5 whereas the tech library value is -1.0. This parameter is the exponent that determines the temperature coefficient of the electron mobility. | ||
===Solution=== | ===Solution=== | ||
If you are working on temperature-critical designs or temperature-compensating a circuit, it is recommended that you copy the default tech library, <code>ami06.scs</code> from <code>/remote/cadencelib/ncsu_local/models/spectre</code> to a local folder, make the modification, and carry out the new simulation with the new library. You can load it in your Analog Design Environemtn under Setup->Model Libraries. | If you are working on temperature-critical designs or temperature-compensating a circuit, it is recommended that you copy the default tech library, <code>ami06.scs</code> from <code>/remote/cadencelib/ncsu_local/models/spectre</code> to a local folder, make the modification, and carry out the new simulation with the new library. You can load it in your Analog Design Environemtn under Setup->Model Libraries. | ||
Latest revision as of 21:24, 11 February 2015
cdsdocs
Problem
Cadence documentation appears to be totally inaccessible at ISU! When trying to load the Cadence documentation with the command cdsdoc the following error message appears:
/usr/local/cadence/ic/tools/jre/bin/java: error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory
Solution
I am not sure where this came from but the command cdsdoc has been deprecated. Cadence recommends you use cdnshelp command which does work. -sjnystro
AMI (ON Semi) 0.5u tech library inconsistency - temperature coefficient
Problem
It has been observed that the BSIM3 parameter ute is assigned a value in the default tech library which does not match the test data available on the MOSIS website. The value in almost all of the test runs is -1.5 whereas the tech library value is -1.0. This parameter is the exponent that determines the temperature coefficient of the electron mobility.
Solution
If you are working on temperature-critical designs or temperature-compensating a circuit, it is recommended that you copy the default tech library, ami06.scs from /remote/cadencelib/ncsu_local/models/spectre to a local folder, make the modification, and carry out the new simulation with the new library. You can load it in your Analog Design Environemtn under Setup->Model Libraries.