Questions tagged [orcad]

OrCAD is an EDA (electronic design automation) suite that includes schematic capture, PCB layout and several other related modules.

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Conversion from Allegro *.brd to *.alg

Can anyone who works with Cadence Allegro convert a *.brd file to *.alg ?
Douglas Lima's user avatar
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1 answer
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OrCAD - Splitting signals

how can I split signals like in the picture below in OrCAD? I was trying to find it, but unsuccessfully.
Simplifier's user avatar
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Optocouplers for comparator as current detector

I'm working on the realization of overcurrent detection that will be powered by a battery supply. I successfully simulated a comparator with an operational amplifier that will set the output high when ...
Simplifier's user avatar
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1 answer
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Comparator connection with SR latch v2

I designed a comparator that sets 12 V on the output whenever there is overvoltage on the input of the comparator (13 V from AC sin source). In my schematic, the output value of the SR latch reacts to ...
Simplifier's user avatar
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1 answer
91 views

Flip-flop logic for comparator of overcurrent detection

I'm working on the realization of overcurrent detection that will be powered by a battery supply. I successfully simulated a comparator with an operational amplifier that will set the output high when ...
Simplifier's user avatar
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3 answers
196 views

Why is the output of this LM324 op-amp circuit 0V? Orcad/pspice question

I'm trying to make a function generator using three op-amps, specifically the LM324. Right now I'm trying make the first square wave output using a DC input: My OrCad simulation's output constant ...
Yeomaster's user avatar
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2 answers
76 views

Comparator as a current detector with shunt resistor v2

I have a comparator with a shunt resistor that measures the voltage and when the voltage of 12 V from the source exceeds the Vref (1 V in my case) it switches to "high" output. I would like ...
Simplifier's user avatar
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Comparator as a current detector with shunt resistor

I would like to design in OrCAD a comparator with a shunt resistor that will measure the voltage and when the voltage value is exceeded it will flip. I have designed the comparator but I don't know ...
Simplifier's user avatar
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Importing Cadstar/Orcad project into Altium

I have a couple of questions regarding the importing process from Cadstar/Orcad project files to Altium. First question is regarding the importing process itself. I have managed to import into Altium ...
Andres's user avatar
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Ripple Noise Using Capture CIS and PSpice

I am trying to measure the ripple output noise of a regulator using simulation on Orcad CIS and PSpice. The output voltage and current are correct however the transient time response is not showing ...
Roy's user avatar
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OrCAD Capture Test Point

Does OrCAD Capture carry a test point part in an inbuilt library to be used in a schematic?
Efanatic's user avatar
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Problem with NMOS simulation in OrCAD

I have to run a simulation on how NMOS transistors work using OrCAD PSpice. Schematic: Simulation Profile: Simulation: As you can see the problem is that after sweeping VGS from 0 V to 12 V the ...
dim1221's user avatar
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Orcad: less than 2 connections on the emitter of the PN2222

I keep getting an error while simulating concerning the emitter node. Can anyone help?
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How can I convert a stim signal from analog to digital?

I want to get a digital signal from dstm1,2,3,4, but I can't. What's the problem?
jji's user avatar
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Create a PSPICE library from a schematic

I need to simulate a part in OrCad PSpice, which doesn't have a pspice model anywhere. However, manufacturer have provided a gate level design of the IC on the datasheet. Using which I have ...
aulven's user avatar
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ORCAD: How to automatically change net alias when cut paste circuit blocks

I have couple orcad capture schematic design-related query. I'm on Orcad Capture CIS 17.4 First When I cut and paste a circuit block, the net alias rename the same. Is there an automatic way to have ...
Vikram's user avatar
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How do I set Ron and Roff for SBreak switch in PSpice or OrCAD capture?

I am using SBreak but when I click in the properties I only see: Model, REDFES, TEMPLATE, SIMULATION ONLY, and PKGREF.
Antonella Haro's user avatar
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Automatically renaming Schematic or Page in OrCAD

Background: I would like to start using a version control system (Git) with OrCAD in my organization, and even though it seems that it's not going to be as beneficial as using Git with text-based ...
ZenJ's user avatar
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2 answers
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Error in OrCAD: circuit too large

I am trying to simulate the elliptic filter in OrCAD and I am getting the error: circuit too large. I have attached the screenshots of the circuit and netlist below:
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Op-amp wrong output

I have imported a Spice model of an op-amp from the link below and tried to plot the same outputs, but I am getting different results. Link to the Spice model I used and the desired plot: https://www....
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2 votes
2 answers
370 views

How do I know what each pin represents in a Spice model of an op-amp in OrCAD?

I have imported a Spice model of an op-amp into OrCAD, but the part symbol is different from what I am used to, and I don't know what pins 4, 5, 8, and 11 represent here. Link to spice model I used: ...
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2 answers
326 views

Inductor with center tap - OrCAD [closed]

I am trying to build a circuit in OrCAD, and I have an inductor with tree terminals. which component should I use for it? L=0.02mH
Haspacejar's user avatar
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3 answers
337 views

Water level indicator using CMOS inverter

I want to build the below circuit. The circuit has three levels to indicate water. low->o/p LED. Medium->O/P LED. High->O/P LED + Buzzer. Each level has two types of MOSFET; they work as CMOS ...
Haspacejar's user avatar
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Measure pad size on Allegro Free Viewer 17.4

I need to measure the pad size(length and width ) of an IC pad. May I know how to do the same in Allegro I have highlighted one pad for your reference.
Hari's user avatar
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2 votes
2 answers
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OrCAD Footprint in .brd layout different from the .dra file

I made a custom footprint for an 8 pin TSSOP IC, using custom padstacks and creating a new package (no wizard). Each of the four pins on a side are 0.3mm wide and 0.5mm apart (BSC). In the .dra file ...
InBedded16's user avatar
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1 answer
200 views

orcad pspice simulation

I am trying to simulate this OrCAD PSpice simulation based on TLD5045EJ (led driver IC) which I have downloaded from Infineon website. They already provided a test setup file for simulation, I have ...
Sri's user avatar
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there is an undefinable text as .subckt in the edit spice model section. how can I find the correct one?

I want to copy and use the .SUBCKT model of UCC28C43 which is in an OrCAD capture schematic. I did as follows but the .subckt contains the undefinable text. why is that so? how can I find the correct ....
WeTech's user avatar
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Symbol used for device not found error in Orcad Capture

I have made a schematic and downloaded the footprints and symbols from UltraLibrarian. When I click on a symbol on my schematic, I can see that the footprint is attached to it. But when I create a ...
user3147192's user avatar
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1 answer
138 views

User-Defined voltage / current in OrCAD Capture CIS

I want to excite my circuit with a user-defined voltage source, such as v(t) = t*e^(t)... . Search results suggested using bsource, a part within the analogLib libary. I don't have analogLib nor have ...
Renzo M-Svartz's user avatar
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1 answer
610 views

Is it possible to import CAD model files into LTspice?

There are very beneficial and comprehensive collections of CAD models provided by Mouser or other websites. Is it possible to use them in LTspice?
WeTech's user avatar
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3 answers
463 views

Buck Converter Simulation in OrCAD Capture Lite

I have this really simple buck converter circuit but I am getting really funny results. I tried different input voltages (12-650 V), no matter what I put, it doesn't affect the output. The output ...
Saagar's user avatar
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Altium Simulations

Can Altium do >300V simulations? I don't think there is anything wrong with this circuit. I even tried removing the diode, inductor and capacitor and directly connecting with the resistor for ...
Saagar's user avatar
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1 answer
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How do I connect to a 74LS47 decoder in ORCAD capture cis?

As the question says, I have been trying to connect inputs to a 7447 (7-segment decoder) but I get unknown segments in the pspice simulation, I am using capture CIS and I cannot figure out how to ...
Aaditya's user avatar
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2 answers
275 views

TI Webench and PSpice Conflicting Results for LM3150 Buck Converter

I am currently in the process of designing a 24V to 5V buck converter using the TI LM3150 buck converter (datasheet). I designed the buck converter to meet the following operating parameters: Vin = 6-...
R_Fabek's user avatar
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1 answer
882 views

Why am I getting red lines when simulating this circuit?

I am trying to simulate this circuit but I end up getting red lines on the Pspice simulation, what could have caused this error. The circuit I am trying to emulate in pspice, Here is the circuit ...
Aaditya's user avatar
1 vote
0 answers
310 views

How to set a minimum distance between components in OrCAD PCB Designer?

I am using OrCAD PCB Designer Professional 17.4 and I can't setup the minimum distance between components. This is the "DFA Constraints Dialog" from Allegro in which you can make the setup, ...
tgarmp's user avatar
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0 answers
597 views

Nom.lib in OrCad

What is the nom.lib in orCad? Why do we need it when trying to simulate a circuit? When I was about to simulate, I saw a youtube video where the guy says that I need to go to 'configuration files' and ...
Murdock 's user avatar
1 vote
0 answers
345 views

Import DXF defined padstacks in to Allegro/Orcad PCB

I'm using Orcad PCB Professional 17.4-2019 S017 I've got a symbol with some funky pads on it, one the padstack editor cannot generate. Here's where I'm trying to get to. Green is mask boundary, blue ...
pgvoorhees's user avatar
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1 answer
401 views

Problem simulating 2-bit counter with OrCAD

I used OrCAD Capture to create a 2-bit counter using two D-type Flip-Flops (DFFs). Here is the schematic: My problem is that I get no output when I try to simulate it. I know for sure that V3, the ...
Corentin F's user avatar
2 votes
2 answers
257 views

How to simulate LVT BiCMOS PSpice models?

I'd like to simulate the digital 74LVTxx chips with their analog characteristics. Packages like Multisim and OrCad only have the basic models (e.g. 74LS04N). ...
Drakes's user avatar
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1 answer
563 views

PSpice Simulation of a 741 Op-Amp BJT configuration not working?

I'm simulating the following circuit of the 741 operational amplifier with BJTs: I've configured my circuit to be a non-inverting fashion, so in theory the gain would be -Rf/Ri. However, no matter ...
Zashiony's user avatar
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0 answers
159 views

How to install the downloaded model file to pspice?

I am newbie in pspice.I am using 17.4 version of Orcad.I have downloaded mosfet model from a site.Model includes this files: "device.lib" , "device.olb" and "device.ind" ...
john_slv's user avatar
2 votes
0 answers
169 views

Sample and hold & analog shift register

I have this circuit (see first picture.) it's an analog shift register where instead LF386 I use LF398H. This circuit must provide an hyperchaotic behavior for initial conditions x1(0) = l, x2(O) = O....
Julien's user avatar
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0 votes
1 answer
283 views

RC circuit and HEX SCHMITT-TRIGGER INVERTERS

I have a complex circuit, and I am dealing with a problem that appears. I have a RC circuit followed by a 7414 Trigger inverter. My input voltage is 90mV and after the simulation the output looks like ...
Julien's user avatar
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1 vote
1 answer
1k views

How to find Vthreshold and K (or beta) in Pspice/Orcad

Regarding M2n7000 transistor in OrCAD, I want to find its Vthreshold and Beta (or k) by its edit PSpice model. This is what I get : And by Vthresh and Beta (or k ) I mean the parameters of this ...
m0ss's user avatar
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0 answers
83 views

How can I fix the problem of floating nodes in Pspice?

I have so many errors saying there is floating nodes in my circuit, I used a grounded big resistance in some nodes to fix them but there are so many floating nodes errors yet, my circuit is very large ...
Neda's user avatar
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0 votes
1 answer
506 views

I have a problem with using a voltage controlled switch in Pspice

When using the voltage controlled switch in Pspice, the current flowing on the other side of the switch is equal to the current flowing through the voltage source controlling the switch. Why is it so? ...
Neda's user avatar
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0 answers
240 views

Error while generation gerber files

I've created a layout and I want to generate gerber files for further production. I'm using Cadence OrCAD software. But when I try to Create Artwork, I'm getting an error. I've checked the dbdoctor ...
Marco Svizzeri's user avatar
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1 answer
58 views

Working with Mentor Graphics xPCB Planner\xPCB Layout and OrCAD

I'm working with Mentor Graphics xPCB Planner (very similar to xPCB Layout) for placement and OrCAD Capture CIS 16.5 for schematic design. I'm interested in working with both tools in parallel, where ...
Firas Abd El Gani's user avatar
1 vote
1 answer
406 views

Buck converter in pspice output value changes depending on the resistance. How do I correct this?

I am trying to design a buck converter and simulate in pspice, however I am running into trouble. The voltage on the load (R1), varies significantly when the load value changes. How do I correct this ...
mike j 's user avatar