SPICE algorithms incorporate the behavior a variety of devices including resistors, capacitors, inductors, mutual inductors, independent voltage and current sources, four types of dependent sources, switches, uniform distributed RC lines, and the five most common semiconductor devices: diodes, BJTs, JFETs, MOSFETS, and MESFETS. [[B2.Spice A/D]] uses the SPICE algorithms and offers the same circuit capabilities. The BSIM3v3.2 model is another piece that we have added to the simulation engine. This was developed by the bsim3 development team at UC Berkeley. SPICE offers default models of the semiconductor devices; however, the desired parameter values need to be specified. Default model [[parameters]] are available when you create a new model in the Device Editor. You can also specify additional device models if the defaults are not adequate.
== Analog Circuit Analysis Types ==
[[File:b2MAN_Fig212.png|thumb|450px|Running a live simulation of an Op-Amp circuit in B2.Spice A/D with Circuit Animation enabled.]]
SPICE provides several different types of analysis, including Operating Point (DS Bias), DC Sweep, AC sweep, and Transient. DC and Transient analyses are iterative processes which terminate when both of the following conditions are satisfied:
Failure to converge in DC analysis usually results from incorrectly specifying circuit connections, initial values, or model [[parameters]]. Regenerative switching circuits or circuits with positive feedback will often fail to converge, unless the OFF option is used for some of the devices in the feedback path.
== Analog Circuit Analysis ==
[[File:b2MAN_Fig212.png|thumb|450px|Running a live simulation of an Op-Amp circuit in B2.Spice A/D with Circuit Animation enabled.]]
[[B2.Spice A/D]] allows both analog and digital stimuli for live simulations. For analog stimuli, you can use the voltage and current sources or the Function Generator or Power Supply in the [[Virtual Instruments]] panel. For a digital stimulus, you can use a digital input or a digital source. Note that when you place a voltage or current source in a circuit, Workshop automatically adds a corresponding Function Generator for you. The voltage and current source's transient properties can be set in the transient page of their property dialogs. This allows a variety waveforms including sinusoidal, triangular, square, exponential, piecewise linear, etc.