SPICE is an acronym for for Simulation Program with Integrated Circuit Emphasis. VALUE is the voltage gain. NC+ and NC- are the positive and negative controlling nodes, respectively. SPICE Quick Reference Sheet v1.0 SPICE ‘Quick’ Reference Sheet THE GENERAL ANATOMY OF A SPICE DECK SPECIFYING CIRCUIT TOPOLOGY: DATA STATEMENTS Basic Components ... or floating points. In this example, the MOSFET is defined by the given parameters in the model. The order of the nodes is drain(D), gate(G), source(S) and substrate(B). It is the result of combining existing SPICE features with some extra analyses, modeling methods and device simulation features. SPICE manual for the format of these waveform specifications. The SPICE comment character is the asterisk, "*". For example, RES1 1 0 3500 or RES1 1 0 3.5E3 One can also use the following scale factors: Suffix Scale T E+12 1,000,000,000,000 Tera G E+09 1,000,000,000 Giga 30-Mar-2018. First developed at UC Berkeley, it is the origin of most modern simulators. Allspice. identification. presents a brief description of the models that SPICE uses to describe the operation of op amps, diodes, MOSFETs, and BJTs. Linear Current-Controlled Current Sources General form: FXXXXXXX N+ N- VNAM VALUE Examples: F1 13 5 VSENS 5 N+ and N- are the positive and negative nodes, respectively. This is especially important for big circuits consisting of many small sub-circuits from different files. The Spice commands under “MODEL Descriptions” are used to define the electrical properties of particular devices. In the “NETLIST Description”, the components are listed with the nodes they are connected to. o.ov 0.5V I.ov 1.5V 2.ov -I(Vds) 2.5V 3.ov 3.5V 4.ov 4.5V Ml 4007NMO VGS VDS dc VDS 0 5 1mV VGS 04 1 .model 4007NMOS KP=O.3E-3 VTO=I) SAT CURRENT AT VGS=4 KP/2 (4-1)A2 = 1.35mA An Op-Amp Example; 4th Tutorial: Transient Analysis. Section B.2 presents design and simulation examples using PSpice. For example, node 4 is connected to the drain of M1 and to the gate and source of M2. The use of M# as the identi-fier designates a MOSFET. Allspice is a berry that has combined flavors of pepper, nutmeg, and cinnamon. Finally, design and simulation examples utilizing Multisim are presented in Section B.3. NGSPICE is an open source mixed-signal circuit simulator. 220-spice-notes.tex Page 5 Passive Elements The that begins an element instance denotes the circuit element.The passive elements are Ror rfor resistors, Lor lfor inductors, and Cor cfor capacitors. Here’s some SPICE code basics. This is followed by a unique instance name and then (in order) the nodes associated with + and - voltage and the value of the associated parameter (R, L, or C). Each of the spices on this list has its own distinct flavor and uses. Declaration ***** SPICE COURSE EXAMPLE INVERTER LJC *****.LIB 'mm018.l' tt.GLOBAL Vdd.TRAN 1ns 1000ns.OPTION post ***** VOLTAGE SOURCE ***** Vsource0 Vdd 0 1.8v SPICE Model for AN0116 Device. Linear Inductors; Linear Capacitors; Transient Analysis; Use of the .PROBE Command; Example of Transient Analysis; 5th Tutorial: Steady State AC Analysis. MOSFET SPICE Model These and remaining nMOS model parameters: Parameter Symbol SPICE name Units Standard Value Channel length L LEFF m Polysilicon gate length Lgate Lm Gate-source overlap LD LD m 0 Transconductance parameter µnCox’KPA/V2 50 x 10-6 Threshold voltage VT0 VTO V 1.0 Channel length modulation parameter λ LAMBDA V-1 0.1/L (L in µm) Spice Details. The first line of code is the title used to reference the circuit throughout the output file. Lines 10 and 11 describe the two MOSFETs in the inverter. Add it to stews, soups, and desserts for depth of flavor. 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