ace-PTM

PTM ported to Cadence® Spectre®, mainly intended as backend for AC²E.

Technology

Includes the following device models:

• 130nm: ./130/pdk/ptm.scs
• 90nm: ./090/pdk/ptm.scs
• 65nm: ./065/pdk/ptm.scs
• 45nm: ./045/pdk/ptm.scs
• 32nm: ./032/pdk/ptm.scs

Statistical Model

The nfet and pfet sub-circuits add a statistical variation to the nmos and pmos models respectively.

Device Characterization

The primitive devices may be characterized by adjusting the include statement in chr/ptm-<n|p>mos.scs or passing the include directory to spectre via the -I flag and running:

$ spectre -I./XXX/pdk ./chr/nmos.scs
$ spectre -I./XXX/pdk ./chr/pmos.scs

Alternatively, the script in ./src/char.pl can be used.

perl ./src/char.pl [--tech NODE] [--nmos] [--pmos]

If no NODE is specified, all node swill be used. If neither device type is specified, both will be used.

Example:

# Characterize everything.
$ perl ./src/char.pl 

# Characterize 90nm, 32nm and 130nm NMOS devices.
$ perl ./src/char.pl --tech 90 --tech 32 --tech 130 --nmos

Testing

Running the test script in ./src/test.pl should run through all technologies once and produce no errors. There should be spectre .log files in the ./src directory afterwards, corresponding to each test. These may give better insight as to what might be going wrong.

Circuits

op1

... under construction

op2

Symmetrical Operational Amplifier with NMOS Differential-Pair. Utilize the SingleEndedOpampEnvironment in ACE for characterization.

Or run from the command line via

$ spectre -I./XXX/pdk ./XXX/op2/input.scs

Schematic

Parameters and performances can be found in ./op2/properties.json.