Programming instructions

Analog Components
Multisim Component Reference Guide 5-10 ni.com
5.3.1 Comparator: Simulation models
A virtual comparator is provided along with several levels of simulation models of increasing
complexity and accuracy. Similar to the opamps, the real models are developed by the
manufacturers and may have additional pins to model added functions.
5.4 Wide Band Amplifier
The typical opamp, such as a general purpose 741 type opamp, has been internally
compensated for a unity gain bandwidth of about 1 MHz. Wide band amplifiers are opamps
that have been designed with a unity gain bandwidth of greater than 10 MHz and typically in
the 100 MHz range. These devices are used for application such as video amplifiers.
5.4.1 Wide Band Amplifier: Simulation models
The same levels of simulation model as the opamps are provided with several levels of
simulation models of increasing complexity and accuracy.
The following model levels are used to distinguish between these models:
• L1 - this is the simplest model with the opamp modeled as a gain block with a differential
input and a single ended output.
• L2 - this is a more complex model in which the supply voltages are included in the
simulation.
• L3 - this is a model of increasing complexity where additional control pins are supported.
• L4 - this is the most complex and accurate model with a majority of the external control
pins modeled.
ComponentRef.book Page 10 Thursday, December 7, 2006 10:12 AM