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-====== Simulation references ======
-[ __[[vlsi:home|Home]]__ ]
-[ __[[vlsi:workbook|VLSI Design WorkBook]]__ ]
-[ __[[vlsi:analog_main#contents|Back to index]]__ ]
-== Contents ==
-   * [[vlsi:analog_simref#introduction|Introduction]]
-   * [[vlsi:analog_simref#reference_documentation|Reference documentation]]
-   * [[vlsi:analog_simref#dc_operating_points|DC operating points]]
-   * [[vlsi:analog_simref#power_consumption_evaluation|Power consumption evaluation]]
-   * [[vlsi:analog_simref#ADE_simulation_options|ADE simulation options]]
-   * [[vlsi:analog_simref#node_impedance_simulation|Node impedance simulation]]
-   * [[vlsi:analog_simref#pwl_voltage_and_current_sources|PWL voltage and current sources]]
-   * [[vlsi:analog_simref#noise_analyses|Noise analyses]]
-**Keywords:**
-===== Introduction =====
-In this page we give a detailed description of a few **common simulation tasks**
-(e.g. //power consumption evaluation// in Cadence) which can be encountered during the
-analog design activity.
-===== Reference documentation =====
-Spectre ssimulator official documentation! Si impara praticamente tutto!
-Attenzione pero' che e' sotto **MMSIM** (Multi-Mode Simulation) package!
-//Spectre User Guide// and //Spectre Reference Guide//
-''/usr/cadence/MMSIM_10.11/doc/spectreuser/spectreuser.pdf''
-''/usr/cadence/MMSIM_10.11/doc/spectreref/spectreref.pdf''
-===== DC operating points =====
-MOS transistor parameters evaluated from the transistor model, typically some version
-of the **BSIM4** model.
-**ADE L => Results => Print => DC Operating Points**
-Quali DOP vengono elencati dipende poi dal modello!
-I DC op. poiints piu' importanti sono:
-^   Parameter                  ^     Description    ^
-|''<sub>betaeff        </sub>''|                    |
-|''<sub>gds            </sub>''|                    |
-|''<sub>gm             </sub>''|                    |
-|''<sub>id             </sub>''|                    |
-|''<sub>ids            </sub>''|                    |
-|''<sub>region         </sub>''|                    |
-|''<sub>ron            </sub>''|                    |
-|''<sub>vds            </sub>''|                    |
-|''<sub>vdsat          </sub>''|                    |
-|''<sub>vgs            </sub>''|                    |
-|''<sub>vth            </sub>''|                    |
-\\
-''betaeff''\\
-\\
-''gmoverid''\\
-etc.
-===== Analyses overview =====
-breve rassegna di cosa vuol dire simualre
-DC, TRAN, AC etc.
-^      **Calculator**           ^     **Description**                       ^     **OCEAN syntax example  **         ^
-| ''<sub> vt            </sub>''| wire transient voltage                    | ''<sub>VT("/out")              </sub>''|
-| ''<sub> it            </sub>''| node transient current                    | ''<sub>IT("/M1/D")             </sub>''|
-| ''<sub> vf            </sub>''| wire AC sweep voltage                     | ''<sub>VF("/Vin")              </sub>''|
-| ''<sub> if            </sub>''| node AC sweep current                     | ''<sub>IF("/C0/MINUS")         </sub>''|
-| ''<sub> vdc           </sub>''| wire DC voltage                           | ''<sub>VDC("/vdd_disc")        </sub>''|
-| ''<sub> idc           </sub>''| node DC current                           | ''<sub>IDC("/V0/PLUS")         </sub>''|
-| ''<sub> vs            </sub>''| wire DC sweep voltage                     | ''<sub>VS("/net012")           </sub>''|
-| ''<sub> is            </sub>''| node DC sweep current                     | ''<sub>IS("/R1/PLUS")          </sub>''|
-| ''<sub> op            </sub>''| instance DC operating point               | ''<sub>OP("M0","gm")           </sub>''|
-| ''<sub> opt           </sub>''| instance transient DC operating point     | ''<sub>OPT("M0","vth")         </sub>''|
-| ''<sub> var           </sub>''| design variable                           | ''<sub>VAR("Ibias")            </sub>''|
-| ''<sub> mp            </sub>''| instance model parameter                  | ''<sub>MP("M0","vtho")         </sub>''|
-===== Power consumption evaluation =====
-How to evaluate the power consumption. A detailed Wiki page about this topic has been created,
-see __[[vlsi:analog_power_sim|here]]__.
-===== ADE simulation options =====
-Importante! soprtattutto a livello di **numerical evaluation**, serve sapere
-che esistono dei **checks** su gmin, etc.
-**ADE L => Simulation => Options => Analog...**
-{{:vlsi:spectre_simulator_options_main.png}}
-{{:vlsi:spectre_simulator_options_check.png}}
-===== Node impedance simulation =====
-How to evaluate the **total impedance** at a node.
-A detailed Wiki page about this topic has been created, see
-__[[vlsi:analog_impedance_sim|here]]__.
-===== PWL voltage and current sources =====
-piecewise linear (PWL)
-Vpwl (piece-wise linear) to be used in **transient simulations**.
-Values can be also specified into a plain text file and then using
-a **Vpwlf** voltage source, which takes file values and convert them
-to a standard **Vpwl** source.
-**analogLib => Sources => Independent => Vpwlf**
-The syntax is a column of time values and a column of voltage or current values,
-<code>
-t0   vo
-t1   v1
-t2   v2
-...  ...
-</code>
-Specify the **full path to the file** or copy it in the same directory of the netlist
-<code>
-cd ~/scratch/<tech_dir>/data
-mkdir vpwlf
-</code>
-Notare che posso anche passare il nome del file ad ADE come variabile, usare
-<code>
-pPar("filename")
-</code>
-nel CDF parameter dell'istanza.
-[[http://www.cadence.com/Community/forums/t/23078.aspx]]
-===== Noise analyses =====
-Both standard AC noise analysis and transient noise analysis. Click [[vlsi:analog_noise_sim|here]].
-====== ======
-\\
-----
-Last update: [[pacher@NOSPAMto.infn.it|Luca Pacher]] - Apr 23, 2013
-~~NOTOC~~