op amps, diodes tom epplin: [email protected] intro to ni multisim 10.1
TRANSCRIPT
Op Amps, Diodestom epplin: [email protected]
Intro to NI Multisim 10.1
Getting Started with Multisim (CEC)
> Engineering>
NationalInstrumentsMultisim 10.1
Getting Started with Multisim (CEC)
Adding Multisim Components
> PlaceComponent
Adding Multisim Components
> GroupBasic
Adding Multisim Components
> Capacitor300nF
Ok
(Objects may be rotated using Edit -> Orientation)
Adding Multisim Components
Adding Multisim Components
Adding Multisim Components
> PlaceWire
(or Ctrl+Q)
(Note that red dots appear where successful junctions have been established)
Adding Multisim Components
Don’t forget to place an appropriate reference ground:
> PlaceComponent
SourcesPower_Sources
o Ground
Example Problem 1: Op Amp
Input
Output
V2
V1
V3
Example Problem 1: Op AmpSolving manually:
V1 = (12V)(1kΩ/3kΩ)= 4V
V2 = V1= 4V
(12V – 4V)/3kΩ = (4V – V3)/6kΩV3 = -12V
Example Problem 1: Op AmpSolving using Multisim:
Compare voltages in circuit using an oscilloscope:> Simulate > Instruments > OscilloscopeAttach oscilloscope terminals across voltages to be
compared:
Example Problem 1: Op AmpSolving using Multisim:
Double-click on the oscilloscope to bring up its display, and hit the green play button in the Multisim toolbar
Example Problem 1: Op Amp
V3 = -12V
Example Problem 2: Diode
Input
Output
V1
Example Problem 2: DiodeSolving manually:
Try top diode conducting:Then, in ideal case (no loss through diode), V1 ≈ 3V
If V1 = 3V, then the middle and bottom diodes are not forwards-conducting
…No contradictory assumptions, and all voltages complicit
V1 ≈ 3V
Example Problem 2: DiodeSolving using Multisim:
Example Problem 2: Diode
V1 = 2.7V(real diode properties used)