Programming instructions

Basic Components
Multisim Component Reference Guide 2-20 ni.com
4. Optionally, enter information in the Component Type (for example, carbon film) and
Hyperlink fields.
5. Optionally, enable the Additional SPICE Simulation Parameters fields described below:
•
Temperature (TEMP) — the device’s operating temperature.
•
Temperature Coefficient (TC1) — first order temperature coefficient.
•
Temperature Coefficient (TC2) — second order temperature coefficient.
•
Nominal Temperature (TNOM) — the normal temperature at which model parameters
are measured and calculated.
6. Optionally, change the Layout Settings as described below:
•
Edit Footprint button — click to display the Edit Footprint dialog box where you can
select a new
Footprint and Manufacturer.
Note For information on placing resistors, and information on how to edit footprints, refer to
the
Multisim User Guide or the Multisim helpfile.
2.7 Capacitor
A capacitor stores electrical energy in the form of an electrostatic field. Capacitors are widely
used to filter or remove AC signals from a variety of circuits. In a DC circuit, they can be used
to block the flow of direct current while allowing AC signals to pass.
A capacitor’s capacity to store energy is called its capacitance,
C, which is measured in
farads.
Capacitors in an AC circuit behave as “short circuits” to AC signals. They are widely used to
filter or remove AC signals from a variety of circuits — AC ripple in DC power supplies, AC
noise from computer circuits, etc.
Capacitors prevent the flow of direct current in a DC circuit. They can be used to block the
flow of DC, while allowing AC signals to pass. Using capacitors to couple one circuit to
another is a common practice.
Capacitors take a predictable time to charge and discharge and can be used in a variety of
time-delay circuits. They are similar to inductors and are often used with them for this
purpose.
ComponentRef.book Page 20 Thursday, December 7, 2006 10:12 AM