lab06

ELEC 101

Lab 6 Drawing Circuits

February 2004 ELEC 101 - Lab 6

Lab 6 Objectives •  Identify Circuit connections and configuration

–  Series Connections –  Parallel Connections –  The Series Circuit –  The Parallel Circuit –  The Series-Parallel Circuit

•  Drawing Circuits –  Entering Components –  Rotating components –  Changing component values and labels –  Selecting and moving components or groups of components

Lab 6

Circuit Configurations


The Series Circuit

•  Single path from + terminal of source, through components, to – terminal of the source –  Current is the same everywhere in the circuit

•  There are 3 nodes in the circuit shown •  If a component is added in series

–  Break the circuit where you wish to add the component –  Enter the component and wires as necessary to complete the circuit –  Each component added in series adds one more node


The Parallel Circuit

•  Multiple paths from + terminal of source, through components, to – terminal of the source –  Current in each branch depends on value of branch resistance

•  There are 2 nodes in the circuit shown •  If a component is added in parallel

–  Enter the component in parallel where desired –  Add wires as necessary to complete the circuit –  When a component is added in parallel does not create a new node


The Series-Parallel Circuit

•  R1 and R3 are in series •  The series combination of R1 and R3 is in Parallel with R2


The Series-Parallel Circuit

•  R2 and R3 are in Parallel •  The Parallel combination of R2 and R3 is in series with R1

Lab 6A

Components Used in this Lab


VDC- The DC Voltage Source

Insert Anode, the + terminal up. Usually, the – terminal will be grounded


VDC – Battery or DC Voltage Source

•  Orientation is significant •  Two Terminals

–  Anode –  Cathode

•  Enter component according to instructions or polarity of output will be reversed and considered incorrect

•  You can change the Part Reference (VS above) and the Part Value (12VDC) •  DCL on the Reference or value and change in dialog box •  CL on Component and CR to open Property Editor


Property Editor

•  The Property Editor presents the part information in a spreadsheet format •  All values and part information about the selected part can be edited and displayed

or hidden •  More difficult than previous method to change values and part references since you

must find the right boxes and replace the current values –  the red arrows in the graphic above show where to change the component value and part

reference for the VDC source •  Usually requires horizontal scrolling •  There are easier ways to modify part values


R - The Resistor

Orientation of resistors are not important – They are linear and bilateral


GND/CAPSYM - Ground

Make sure you change the name is 0 or PSpice will generate an error message when a simulation is attempted

Lab 6A

Drawing a Series Circuit


Creating Schematics •  When drawing a schematic, it is most efficient if you

–  Place Components –  Modify part values and part references if necessary –  Move the part references and part values if desired –  Move and realign components as necessary to create a

professional schematic –  Add wires –  Add at least 1 ground named 0 –  Add one or more net alias if desired


Lab 6A Schematic

<= Part Reference

<= Part Value


Place Net Alias


Circuit for Lab 6A

Lab 6B

Drawing the Circuit


Drawing the Circuit •  Place the components at the desired location •  Modify the part values and part references as necessary •  Place wires to complete the circuit •  Place at least 1 ground named 0 •  If necessary, place a Net Alias at desired nodes


Place the Parts


Modify Part References and Values

If desired, reposition the part references and values to make the schematic neat.


Lab 6B Final Circuit

Lab 6C

Complex Circuits with Crossovers

New Parts Used in the Drawing


AC Sine Sources


NPN Transistor

Q2N2222A Model Parameters .model Q2N2222 NPN(Is=35f Xti=3 Eg=1.11 Vaf=100 Bf=250 Ne=1.5 + Ise=1.2f Ikf=.1 Xtb=2 Br=6 Nc=2 Isc=.1f Ikr=1000 Rc=20 + Cjc=20p Mjc=.33 Vjc=.75 Fc=.5 Cje=35p Mje=.33 Vje=.75 + Tr=13n Tf=530p Itf=.6 Vtf=1.7 Xtf=3 Rb=100)


Capacitor


VCC Bar


Two types of Crossovers

When you draw a wire that crosses over another, you must pay particular attention at the junction so the schematic is drawn correctly. The presence of a dot denotes a node


Make sure there is no dot at the crossover


Circuit for Lab 6C


Modifying the Q1 Model

CL on Q1. CR and CL on Edit PSpice Model. CL in right window of the Model Editor, press CTRL HOME The cursor should move to the beginning of the model statement. Type an asterisk followed by your last name.

Circuits for Submission


Circuit for Lab 6A


Circuit for Lab 6B


Circuit for Lab 6C


Model Statement for Lab 6C *Your_Last_Name .model Q2N2222 NPN(Is=35f Xti=3 Eg=1.11 Vaf=100 Bf=250 Ne=1.5 + Ise=1.2f Ikf=.1 Xtb=2 Br=6 Nc=2 Isc=.1f Ikr=1000 Rc=20 + Cjc=20p Mjc=.33 Vjc=.75 Fc=.5 Cje=35p Mje=.33 Vje=.75 + Tr=13n Tf=530p Itf=.6 Vtf=1.7 Xtf=3 Rb=100) * National pid=19 case=TO18 * 88-09-07 bam creation

lab06

Technology

Transcript of lab06