ORCAD PSPICE 16

ORCAD PSPICE 16.3

INTRODUCTION ORCAD PSPICE 16.3 : Cadence is the world's largest supplier of electronic design technologies and engineering services. Cadence products and services are used to accelerate and manage the design of semiconductors, computer systems, networking equipment, telecommunications equipment, consumer electronics, and other electronics based products. With approximately 4,850 employees and 2003 revenues of approximately $1.1 billion, Cadence has sales offices, design centers, and research facilities around the world. The company is headquartered in San Jose, Calif., and trades on both the New York Stock Exchange and NASDAQ under the symbol CDN. OrCAD offers a total solution for your core design tasks: schematic- and VHDL-based design entry; FPGA and CPLD design synthesis; digital, analog, and mixed-signal simulation and printed circuit board layout. What's more, OrCAD's products are a suite of applications built around an engineer's design flow—not just a collection of independently developed point tools. PSpice and PSpice A/D are just one element in OrCAD's total solution design flow. Welcome to OrCAD. With OrCAD's products, you'll spend less time dealing with the details of tool integration, devising workarounds, and manually entering data to keep files in sync. Our products will help you build better products, faster, and at lower cost In today’s competitive environment where time to market is critical and electronic products have shorter life spans, companies must streamline their entire product development process. Placing parts on the design directly from Digi-Key greatly reduces the chance of costly re-spins due to wrong, obsolete, or non-compliant parts, and it reduces the administrative overhead involved in validating new part requests. Having the cost information available also assists in monitoring product production costs and therefore profitability. OrCAD is the leading supplier of Windows(R) EDA software and services to electronics companies worldwide. "OrCAD is the first company to offer this `information application ware' to its customers, and we offer it free of charge," stated Jim Plymale, OrCAD's vice president of marketing. "Engineers need easier ways to research, design-in, and procure parts for prototypes. And, electronics companies want to streamline the information flow between engineering, purchasing, manufacturing, and Vi Microsystems Pvt. Ltd., [1]

ORCAD PSPICE 16.3

suppliers. Our Release 9.1 products enable this by making information available and actionable from within the engineer's design tools." OrCAD's new activeparts.com design center features an online catalog of over half a million components with nearly 100,000 more being added each month. It gives engineers all available component data including schematic symbols, manufacturer datasheets, pricing, and availability from leading distributors. In Q4 1999, OrCAD expects that activeparts.com will support online purchasing of components, including prototype kitting services. The design data in the new activeparts.com online design center and OrCAD's design entry products are completely compatible. This means engineers can freely move design data across applications. "ESI has been using OrCAD's CIS(tm) (component information system) products for some time," stated Steve Harris, electrical engineering manager, Electro Scientific Industries. "This technology enables our engineers to easily search for existing parts within our corporate-wide database. We recently had the opportunity to test-drive the new activeparts.com, and are very excited about the possibilities it has for increasing design productivity. I plan to promote the site as the starting place to go for ESI electrical engineers when searching for new part data." The Digi-Key part database provides a number of benefits to both design engineers and companies in general. Parts can be ordered online 24/7 and received the next day. Digi-Key is a reliable source of parts that companies trust .All parametric data, RoHS compliance status, and mechanical dimensions are available Pricing and in-stock quantity information helps control costs and ensures part availability .Industry surveys consistently show Digi-Key #1 for “Breadth of Product” offered and “Availability of Product” “At Digi-Key, we take pride in finding new ways to provide the best service possible,” said Mark Larson, president and COO at Digi-Key. “Building on our success of having the number one website in our industry, we decided to make our web data available so that EMA could get our parts in front of engineers at the point of part selection. We think that this is unique in the industry and a significant step towards changing the way companies selects parts for their products.” EMA integrated the Digi-Key database into OrCAD Capture CIS by creating Vi Microsystems Pvt. Ltd.,

[2]

ORCAD PSPICE 16.3

the EMA Component Information Portal (CIP). CIP is a web-based solution that can be deployed enterprise-wide, providing access to the Component Information System (CIS) behind OrCAD Capture CIS. CIP provides Engineering and Procurement with a more effective way to update the CIS database. CIP provides a user interface for users to provide new part requests and modifications for corporate approval. With the addition of the Digi-Key interface, those new part requests can now come directly from Digi-Key along with all related part information. Furthermore, EMA also offers an enterprise integration, allowing the CIS database to hold data from external systems such as ERP, MRP, PLM, and PDM. CIP becomes an easy to use, single source that combines engineering data with enterprise information. “We’re excited to have Digi-Key data available in our OrCAD schematics,” said Bruce Thivierge, manager, drafting and design services at Canberra Industries. “Having access to part cost information on the engineer’s desktop allows us to do cost roll-ups, especially for prototyping purposes. With the availability of Digi-Key part numbers and quantity on hand information, we can be confident at design time that our purchasing department will order correct parts that are immediately available. This saves time and reduces the possibility for errors.” Electronic circuit design requires accurate methods for evaluating circuit performance. Because of the enormous complexity of the modern integrated computer aided circuit analysis is essential. SPICE is a general purpose circuit program that simulates electronic circuits. SPICE can perform various analyses of electronic circuits. SPICE contains models for common circuit elements, active as well as passive, and it is capable of simulating most electronic circuits. The acronym SPICE stands for simulation program with integrated circuit emphasis.

Vi Microsystems Pvt. Ltd.,

[3]

ORCAD PSPICE 16.3

INSTALLATION PROCEDURE *

System Requirements: Operating System: Windows 2000 with service pack 4 / Windows XP Processor: Pentium 4 equivalent or faster Memory: Minimum 512MB RAM

*

Installing the Cadence License Manager on the server machine: Plug in the hardware lock to the printer port/USB port of the computer. (Please ignore the above step if the license is based upon IP address of the computer). Copy the license file provided in the Cadence License File CD Paste the license file in C:\ or D:\ or any other installation directory Insert the disk1 of Cadence16.2 installation disc Browse under CD Drive:\FLEXlm\flexid and run the flexid installer utility (this step can be ignored for IP address based licensing) Setup will guide you to install the Flexid driver for the hardware lock Select Flexid 8 if the hardware lock is plugged to the printer port. Select Flexid 9 if the hardware lock is a USB port based hardware lock. Run the installation. If the hardware lock is a USB Port based hardware lock, then make sure that a LED on the USB hardware lock is glowing. If not, reboot the computer and then check it. Once the Flexid installation is completed, click on CD ROM drive.


[4]

ORCAD PSPICE 16.3

The Setup utility window pops up on the screen Click on Install software option

Click on License Manager


[5]

ORCAD PSPICE 16.3

Click the Next Button.


[6]

ORCAD PSPICE 16.3

Disable the Antivirus programs before installing the license manager


[7]

ORCAD PSPICE 16.3

Click Next

Click Next


[8]

ORCAD PSPICE 16.3

Click the Install Button.

Browse for the license file and then click “Next”


[9]

ORCAD PSPICE 16.3


At the end of installation you will see a pop up message saying “license manager Started successfully”

Click Finish


[ 10 ]

ORCAD PSPICE 16.3

Now click the product installation.


[ 11 ]

ORCAD PSPICE 16.3


Disable the Antivirus programs before installing the product.


[ 12 ]

ORCAD PSPICE 16.3

Click Next


[ 13 ]

ORCAD PSPICE 16.3

Click Next

Click Next

Click Next


[ 14 ]

ORCAD PSPICE 16.3

Click Next

Click Next


[ 15 ]

ORCAD PSPICE 16.3

Click Next

Some products need Third disk for installation Insert the disk3 and click OK Vi Microsystems Pvt. Ltd., [ 16 ]

ORCAD PSPICE 16.3

To set the license path enter the port address 5280and then go to my computer right click then see the computer name and then in license path type 5280@ computer name.

Click Next


[ 17 ]

ORCAD PSPICE 16.3

Click Finish

Click Yes

FOR CLIENT INSTALLATION Select the second option that is product installation from the set up file and there is no need for the installation of the license file in the client system then follow the same procedure as followed for the server at last in the license path type 5280@server computer name.


[ 18 ]

ORCAD PSPICE 16.3

Pspice toolbars

The PSpice toolbar:

The Schematic page editor tool palette The Part editor tool palette


[ 19 ]

ORCAD PSPICE 16.3

From the File menu, select New, then Project. In the ‘New Project’ window, shown in Figure, Give your project a name, select Analog or Mixed A/D, and select the project location.


[ 20 ]

ORCAD PSPICE 16.3

ORCAD WORKING PROCEDURE From the Start menu, select All Programs, cadence release SPB 16.3. Then select Orcad Capture.


[ 21 ]

ORCAD PSPICE 16.3

’New Project’ window


[ 22 ]

ORCAD PSPICE 16.3

Go to browse create the directory by selecting any drive,then name the directory and name the project

The next window that appears is the ‘Create PSpice Project’ window. Select create a blank project and click OK. The project is now open, and will look something like the screen grab shown in Figure. The Schematic window is where we’ll be constructing the circuit.


[ 23 ]

ORCAD PSPICE 16.3

’New Project’ window


[ 24 ]

ORCAD PSPICE 16.3

Now we want to build the circuit. To get circuit elements, select the Place menu, then Part. PSpice selects parts from its parts libraries. To add these libraries, select Add Library. There will be a folder called pspice. Open this folder, select all the libraries in it (this can be done by highlighting them all at once), then select Open. The result is shown in Figure 6.


[ 25 ]

ORCAD PSPICE 16.3


[ 26 ]

ORCAD PSPICE 16.3

‘Place Part’ window with libraries added and DC voltage source selected

Now if you scroll through the parts list, you’ll see a large number of elements. Since we’re building the circuit from Fig, the first part we want is a DC voltage source. We can select it either by scrolling and finding the name, or by typing Vdc in the Part menu, as shown in Fig. Once you have the part selected, click OK. Place the source on your schematic page by left-clicking on the spot that you want to place it. To stop placing sources, right click and select End Mode. Parts can be moved by simply highlighting and dragging. Now type R into the ‘Place Part’ window to start putting down resistors. Another way to do this is to type R into the pulldown menu at the top when you’re in your Schematic window. Either way, select the resistor part and place four of them on your schematic, as shown in Figure 7. To rotate a resistor, type ‘r’ (on some versions you need to type ‘ctrl+r’) while you have it selected. R3

R1 1k

1k V1 0Vdc

R2 1k

R4 1k

Fig Resistor placement on schematic Change the values of the source each resistor by double-clicking on the value. The ‘Display Properties’ window, shown in Figure , will appear. Replace the value for each element with the numbers given in Figure . to place the wire in keyboard press “w” . Then to rotate the component press “R” in the keyboard.


[ 27 ]

ORCAD PSPICE 16.3

‘Display Properties’ window

Now we’ll wire up the circuit by selecting Place, then Wire. To place the wire, first click on the point where you want to start the connection, then move to the point where you want to end the connection, and click again. To stop placing wire, right click and select End Wire. Like any part, wire can be moved by highlighting and dragging it. Figure 8 shows the result of this step. R3

R1 3.3k

5.6k V1 10Vdc

R2 4.7k

R4 3.6k

Fig: Wired circuit So, what else do we need? Remember that voltage is an energy difference between two points. PSpice calculates voltages at each circuit node, with reference to ground, so every PSpice circuit needs a ground. Each node has a number, and the software recognizes the ground as node 0. Go to the Place menu, then Ground, and type in ‘0’ since we want the ground to be named node 0. Connected it to the circuit as shown in Fig way back at the beginning, and the circuit is complete. Vi Microsystems Pvt. Ltd.,

[ 28 ]

ORCAD PSPICE 16.3

In Orcad we have 4 major types of markers voltage level markers, differential markers, current markers, power markers .so use the voltage the markers place at the input and output.

Now it’s time to simulate. First set up the simulation profile by selecting the PSpice menu and New Simulation Profile. Name your profile and make sure ‘none’ is selected in the Inherit From box. This brings up the ‘Simulation Settings’ window shown in Fig


[ 29 ]

ORCAD PSPICE 16.3

‘Simulation Settings’ window


[ 30 ]

ORCAD PSPICE 16.3


[ 31 ]

ORCAD PSPICE 16.3

To run the simulation, select the PSpice menu, then click Run. Or press F11 from the keyboard.


[ 32 ]

ORCAD PSPICE 16.3 COLLEGE SYLLABUS 1. Differential amplifier

V3 15Vdc

0 R2 10k

R3 10k

V

R1 100k

Q1

Q2

BC548A

BC548A

V

V1 VOFF = 0v VAMPL = 50mv FREQ = 5k

R4 8k

0

-15Vdc

V2

0 0

Simulation Setting:


[ 33 ]

ORCAD PSPICE 16.3

Output waveform:


[ 34 ]

ORCAD PSPICE 16.3 2. Active filters : Butterworth 2nd order LPF (Magnitude & Phase Response) Circuit: C1 0.022u V1 R1

R2

U1 7 3

Vin 1Vac 0Vdc

10k

10k

C2 0.011u

+

V+ OS2

uA741 OUT 2

- 4

OS1 V-

5 6 1

12Vdc V2 V

0 12Vdc

0

R1 = R2 = R = 10KOhm C1 = sqrt 2/ wo*R = 0.022uF C2 = C1 / 2 = 0.011uF

For Cut Off Frequency of 1KHz

Steps to plot DB & Phase Plots for Output Voltage: 1. 2. 3. 4. 5. 6.

In PSpice AD, Choose Add Trace Choose "Plot Window Templates" Under Functions or Macros at top right of Add traces Window Choose Bode Plot dB - separate(1) in Plot Window Templates Type Or Select a Variable V(U1:OUT) [i.e. Output Voltage of Op Amp] Your Trace Expression becomes: Bode Plot dB - separate(V(U1:OUT)) Click OK to get DB & Phase Plots for Output Voltage in PSpice AD window


[ 35 ]

ORCAD PSPICE 16.3 Simulation Setting:

Output:


[ 36 ]

ORCAD PSPICE 16.3


[ 37 ]

ORCAD PSPICE 16.3


[ 38 ]

ORCAD PSPICE 16.3

3. Active filters : Butterworth 2nd order HPF (Magnitude & Phase Response) R1 11k V1 C2

C1

U1 7 3

+

V+ 5 OS2

0.01u uA741 OUT

0.01u

Vin 1Vac 0Vdc

R2 22k

2

- 4 OS1 V-

6 1

12Vdc V2 V

0 12Vdc

0

C1 = C2 = C = 0.01uF R1 = sqrt 2/ (2*wo*C) = 11KOhm R2 = R1*2 = 22KOhm For Cut Off Frequency of 1KHz Steps to plot DB & Phase Plots for Output Voltage: 1. 2. 3. 4. 5. 6.

In PSpice AD, Choose Add Trace Choose "Plot Window Templates" Under Functions or Macros at top right of Add traces Window Choose Bode Plot dB - separate(1) in Plot Window Templates Type Or Select a Variable V(U1:OUT) [i.e. Output Voltage of Op Amp] Your Trace Expression becomes: Bode Plot dB - separate(V(U1:OUT)) Click OK to get DB & Phase Plots for Output Voltage in PSpice AD window

Circuit:


[ 39 ]

ORCAD PSPICE 16.3

Simulation Setting:


[ 40 ]

ORCAD PSPICE 16.3

Output:


[ 41 ]

ORCAD PSPICE 16.3


[ 42 ]

ORCAD PSPICE 16.3

4. Collector coupled astable multivibrator Circuit:

Vcc

6Vdc Rc1 1k

R1 4.7k

R2 4.7k

0

Rc2 1k

C1

C2

4.7u

4.7u V

Q1 Q2 BC107A

BC107A

0

Simulation Setting:


[ 43 ]

ORCAD PSPICE 16.3

Output:


[ 44 ]

ORCAD PSPICE 16.3


[ 45 ]

ORCAD PSPICE 16.3 4) Monostable multivibrator - Transistor bias Circuit: V2

12Vdc R1 5.9k

R3 452k

R5

R2 5.9k

0

10k

C1

C2 V

3.2n V

22p Q2

V1 V1 = 0V V2 = -5V TD = 0ms TR = 0.001ms TF = 0.001ms PW = 2ms PER = 4ms

BC107A Q1

R4 100k

BC107A

V3 12Vdc

0

Simulation Setting:


[ 46 ]

ORCAD PSPICE 16.3

Output:


[ 47 ]

ORCAD PSPICE 16.3


[ 48 ]

ORCAD PSPICE 16.3

Analog multiplier Circuit: D1 V1 VOFF = 0V VAMPL = 1V FREQ = 50Hz

D1N4007 V

V

C1 1n D2

R1 1k

C2 1n

0 D1N4007


[ 49 ]

ORCAD PSPICE 16.3

Simulation Setting:


[ 50 ]

ORCAD PSPICE 16.3

Output:


[ 51 ]

ORCAD PSPICE 16.3

CMOS Inverter Circuit:

IRF9140 M1

V2 V V

V1 V1 = 0V V2 = 5V TD = 0ms TR = 0.001ms TF = 0.001ms PW = 2ms PER = 4ms

M2

5Vdc

Rl 100k

IRFAC30

0


[ 52 ]

ORCAD PSPICE 16.3

Simulation Setting:

Output:


[ 53 ]

ORCAD PSPICE 16.3

CMOS INVERTER


[ 54 ]

ORCAD PSPICE 16.3

Circuit: CMOS NAND Vcc

MbreakP M1

5Vdc

0 MbreakP M2 Output

OFFTIME = .5uS DSTM1 ONTIME = .5uS CLK DELAY = STARTVAL = 0 OPPVAL = 1 OFFTIME = 1uS ONTIME = 1uS DELAY = STARTVAL = 0 OPPVAL = 1

In1

MbreakN M3

Output

V

V

DSTM2 CLK

In2

MbreakN M4

0

V

0


[ 55 ]

ORCAD PSPICE 16.3

Simulation Setting:


[ 56 ]

ORCAD PSPICE 16.3

Output:


[ 57 ]

ORCAD PSPICE 16.3

CMOS NOR Circuit: Vcc OFFTIME = .5uSDSTM1 ONTIME = .5uS CLK DELAY = STARTVAL = 0 OPPVAL = 1 OFFTIME = 1uS DSTM2 ONTIME = 1uS CLK DELAY = STARTVAL = 0 OPPVAL = 1

In1

M4 MbreakP

5Vdc

0

V

In2

M3 MbreakP V

Output V

M2 MbreakN

MbreakN M1

0


[ 58 ]

ORCAD PSPICE 16.3

Simulation setting:


[ 59 ]

ORCAD PSPICE 16.3

Output:


[ 60 ]

ORCAD PSPICE 16.3

OrCAD Simulation 1.

Instrumentation Amplifier:

a)

Circuit:

b)

simulation:

Vcc 3 V1 VOFF = 0V VAMPL = 3V FREQ = 1KHz

+

OS2

OUT 2

Vcc

7 V+

U1

5

1 OS1 V- Vdd

- 4

uA741

R5

R4

1k

1k

V3

6 R1 1k

0

10Vdc

OS1

OUT Vdd OS1

OUT 3 V2 VOFF = 0V VAMPL = 5V FREQ = 1KHz

3

4 -

V-

uA741 2

1 6

5 + 7 OS2 V+ U2 Vcc

R2 1k

+ 7 U3

OS2 V+

R3

R6

1k

1k

V4

0 10Vdc

1 6Vout 5 Vcc

Vdd G nd

-

V-

Rgain 1k

4

Vdd uA741 2

0

0


[ 61 ]

ORCAD PSPICE 16.3


[ 62 ]

ORCAD PSPICE 16.3


[ 63 ]

ORCAD PSPICE 16.3

Output:


[ 64 ]

ORCAD PSPICE 16.3

2.

Instrumentation Amplifier Using DC Source:

a)

Circuit: Vcc U1 7 3

+

V

OUT 2

- 4

uA741

Vcc

5 R5

R4

V3

6

1 OS1 VVdd

R1 1k

1k

10Vdc

1k

0

Vdd uA741 2

Rgain 1k

4 -

VOS1 OUT

Vdd uA741 2

4 -

VOS1 OUT

3 V2 5Vdc

V

+ 7 U2

1 6

5 OS2 V+ Vcc

3 R2 1k

+ 7 U3

OS2 V+

R3

R6

1k

1k

V4

0 10Vdc

1 6Vout 5 Vcc

V

Vdd G nd

V1 3Vdc

V+ OS2

0

0

b)

Simulation:


[ 65 ]

ORCAD PSPICE 16.3

Output:


[ 66 ]

ORCAD PSPICE 16.3

2.1.

Active Low pass Filter:

a)

Circuit: Vcc C1 V1

1n

10Vdc

R2 1k Vdd uA741 2

R1 Vin 5Vac 0Vdc

4 -

OUT 3

0

V1 OS1

1k V

V2

10Vdc

+ 7 OS2 V+ U1 Vcc

6 5

V

Vdd

0

b)

Simulation:


[ 67 ]

ORCAD PSPICE 16.3

c)

Output:


[ 68 ]

ORCAD PSPICE 16.3

2.2.

Active High Pass Filter:

a)

Circuit: Vdd Vdd

-

OS1

110k OUT 3 0.02u V4

0.01u

V

1Vac 0Vdc

R5 110k

+ U1

7

C4

OS2

1 6 5

V

V6 10Vdc

V+

C3

V5 10Vdc

4

uA741 2

V-

R4

Vcc Vcc

0

b)

Simulation:


[ 69 ]

0

ORCAD PSPICE 16.3

c)

Output:

2.3. Active Band Pass Filter: Vi Microsystems Pvt. Ltd.,

[ 70 ]

ORCAD PSPICE 16.3

a)

Circuit: Vcc Vcc

3

+

1k

5Vdc OS2

uA741 OUT 2

V2 0.1Vac 0Vdc

V3

7

U1

V+

R3

-

4

C4 0.1n

OS1 V-

5 C3 6 0.2n

1

V

0 V4

Vdd

R5

R6 10k

5Vdc

1k

R4 1k

Vdd

0

b)

Simulation:


[ 71 ]

ORCAD PSPICE 16.3

c)

Output:

3.1.

Astable Multivibrator Using Op – Amp:


[ 72 ]

ORCAD PSPICE 16.3

a)

Circuit: R1 5k

uA741 2

4 -

V

VOS1 OUT

3 C1 0.1u

+ 7 U1

OS2 V+

V1 12Vdc

1 6 5

V

V2 12Vdc

0

R2 12k

R3 10k

0

b)

Simulation:


[ 73 ]

ORCAD PSPICE 16.3

c)

Output:

3.2. Monostable Multivibrator Using Op – Amp: Vi Microsystems Pvt. Ltd.,

[ 74 ]

ORCAD PSPICE 16.3

a)

Circuit: D1

R6 2.2k

D1N4148

uA741 2

C3

4 -

VOS1

0.1u OUT

0

3 C4

V1 = -5V V2 = 5V TD = 0 TR = 0 TF = 0 PW = 2ms PER = 4ms

V4

D2

+ 7 U2

OS2 V+

1 6 5

V

R4 10k

10n R7 D1N4148 1k

R5 10k

0

b) simulation settings


[ 75 ]

ORCAD PSPICE 16.3

c)

Output:


[ 76 ]

ORCAD PSPICE 16.3

3.3.

Schmitt Trigger Using Op – Amp:

a)

Circuit: Vcc+ R3 R1 10k

10k

V+

3

7

Vcc+ U1 +

OS2

OUT 2 uA741

V

V1 VOFF = 0V VAMPL = 5V FREQ = 1Hz

-

4

OS1 V-

R2 10k

5

Input_Voltage

6 1

5Vdc V

0

0

b)

Simulation:


[ 77 ]

ORCAD PSPICE 16.3

c)

Output:


[ 78 ]

ORCAD PSPICE 16.3

4.1.

Phase Shift Oscillator Using Op – Amp:

a)

Circuit: R10 1Meg

R9

4 2

33k 3

VOS1

1

uA741 OUT

6

-

+ 7 U3

OS2 V+

V3 15Vdc

5

V

V4 15Vdc

R14 33k

C6

C7

0

0.1u

0

b)

C8

0.1u

R11 3.3k

0.1u

R12 3.3k

0

0

R13 3.3k

0

Simulation:


[ 79 ]

ORCAD PSPICE 16.3

c). Output:


[ 80 ]

ORCAD PSPICE 16.3

4.2.

Wien Bridge Oscillator Using Op – Amp:

a)

Circuit:

Gnd

R5 10k

C4 33n C5

R8 10k

33n

V3

U2 7 3

+

2 10k

5

OUT

R6 Gnd

20Vdc

V+ OS2

uA741

-

4

OS1 V-

6 Gnd 1

V

V4

0

20Vdc R7 20k

b)

Simulation:


[ 81 ]

ORCAD PSPICE 16.3

c) Output:


[ 82 ]

ORCAD PSPICE 16.3

5. 1. Astable Multivibrators Using NE555 Timer: a)

Circuit: V4 10Vdc R5 10k

8 U4

4 RESET 7

R6 10k

2 6

VCC

0

DISCHARGE TRIGGER OUTPUT THRESHOLD

3 V

CONTROL GND C6 100n

5

1

555alt

C5 10n

0

b)

Simulation:


[ 83 ]

ORCAD PSPICE 16.3

c)

Output:

5. 2. Monostable Multivibrators Using NE555 Timer: Vi Microsystems Pvt. Ltd.,

[ 84 ]

ORCAD PSPICE 16.3

a)

Circuit: V1 5Vdc 4 R1 11.5k

U1 RESET 6 7

V

C1 1u

2 V2 V1 = -10V V2 = 10V TD = 0 TR = 0 TF = 0 PW = 5ms PER = 10ms

0

b)

VCC

Gnd

THRESHOLD DISCHARGE OUTPUT TRIGGER

3 V

V

Gnd

8

GND

CONTROL

1

5

555alt

C2 10n Gnd

Simulation:


[ 85 ]

ORCAD PSPICE 16.3

c)

Output:


[ 86 ]

ORCAD PSPICE 16

Recommend Documents