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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26 views

Exponential voltage source Pspice

I want to put an exponential voltage source in Orcad / Pspice that \$V(t) = e^t\$. I used Vexp and I don't know how to set \$V1, V2, Td1, Td2, Tc1, Tc2\$. I found an equation $$V(t)= V1+(V2-V1)((1-e^\...
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21 views

Floating Nodes Error in Simulation in ORCAD PSPICE

Does anyone have any insight as to what exactly is wrong with my circuit on Orcad/PSPICE? My name is in the project name so I blurred it out for obvious reasons
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14 views

Mounting hole with vias in OrCAD

I want to create a mounting hole with vias around it. I don't know how to approach it so I've tried to do it on my own. I'm using OrCAD PCB Designer. I have created a mounting hole padstack with ...
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67 views

What's the purpose of a drill symbol?

I use OrCAD environment for designing PCBs but I've never thought about what is the purpose of a Drill Symbol in padstack creator. The diameter is set in the Drill bookmark and other parameters like ...
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1answer
45 views

Output voltage of Class B Amplifier with global negative feedback

For the following schematic on the non-inverting input is applied a sine wave. Shouldn't be the output on R19 0.9 out of the input voltage, by using a voltage divider between R31 and R19. From my ...
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28 views

Why signal coming out of a Constant K filter takes 0.5ms to stabilize?

I made a simulation of an audio amplifier with an input signal of 200 microVolts. The question is why my filter does not deliver the desired output, which operates between 512 Hz and 2048 Hz. From ...
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1answer
41 views

Vias affect traces

I have been working on a project of a 4-layer PCB. Every time I add a via in order to connect two pins, another trace breaks and changes its positon. I've added pictures to explain what I got on ...
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33 views

On measuring the common mode gain of an op-amp using a simulator?

I have been trying for a while now to measure the common voltage gain of the LM741, which according to Op Amps: Design, Application, and Troubleshooting page 21 is around 6, using Multsim and Orcad. ...
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44 views

OrCad PSpice: Did I design the circuit wrong?

I keep getting 0 volts when I design this circuit but I was supposed to get a value of 1V at least. How I would be able to fix this circuit? The circuit that we were supposed to design was Fig(74)....
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41 views

ORCAD - Oscillator startup

I'm simulating an oscillator that I have designed for a 40kHz oscillation frequency. I simulated it in Orcad and I got a flat signal. After some research, I found that it's due to the program not ...
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31 views

No connection between symbols

I've been working on a project of power converter in OrCAD software and I've come across such problem. Here is a piece of my schematic. A Q1 transistor is in an SOIC-8 package. A Source pin is ...
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1answer
22 views

Number of pins of elements

I've created a footprint for the rotary encoder, which symbol is shown below A footprint for this element has been done by myself. I've been getting a warning which goes like this: "WARNING(ORCAP-...
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2answers
26 views

Cut Off mode of an NPN transistor with PSPICE

]2 I am trying to model the cutoff mode of an NPN transistor with a switch that is connected to the base. Unfortunately, it shows current going through. I am using ORCAD Capture. Does anyone know ...
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5 views

Orcad 9.2 Library Problem

I just installed Orcad 9.2 but when I try to add the libraries from the Capture/Library/Pspice folder it says "Object not found" for any of them, although they are in the folder. Has anyone else ...
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1answer
23 views

Orcad hierarchical design alias / physical net

A hierarchical based Orcad schemactic has two children blocks and the parent one. Each child block is connected through the parent via the net called VDD_IN. However, once I hover on the net, a ...
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1answer
70 views

How to update a title block in OrCad?

I've created a custom title block for my schematics. The problem is that I've already started the project and it is in advanced state of progress. How can I update it? Is it even possible?
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1answer
54 views

Simulation of an Operational Transconductance Amplifier in Orcad Capture

I wanted to simulate an OTA (Operational Transconductance Amplifier) by using a block G representing a controlled source (I have also put input and output resistances): First question: how can I ...
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2answers
80 views

OrCAD Schematic cleaner option

I am using 16.6V Allegro.Is there any option on OrCAD Capture CIS for beautifying Schematic? For example, say, I have entered a schematic with irregular wires and used long wires. Is there any ...
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34 views

OrCAD Bus/Netgroup Connections Between Hierarchical Blocks

In the microcontroller block (right), I have a bus named GPIO_J[0..7] that runs to a port leaving the block. I need to connect it specific signals on the netgroup SW_Mux[0..5] leaving another ...
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1answer
116 views

How to draw/include ESD susceptibility symbol on my designs?

I am using Allegro 16.6V. I want to draw/include ESD susceptibility, non-recyclable and recyclable symbols on my design. How can I do this?
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23 views

How to use electrolytic capacitors in Orcad Capture [duplicate]

I want to specify voltage across the electrolytic capacitor in Orcad but there seems to be no way to this. I'm using C_elect part and the panel to choose the value ...
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45 views

Not connected pin in Orcad Capture

I have a pot (R8), as you can see, C6 capacitor is connected to its middle terminal, I have trouble implementing this in Orcad as it says that the negative terminal of the capacitor is connected to ...
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2answers
201 views

How to specify polarization voltage in polarized capacitors in Orcad Capture

I have a polarized capacitor like below. it's 1uF and 16V. the schematic in Orcad is like this: How can I specify that 16V voltage?
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21 views

net class management in ORCAD CAPTURE

I am currently building a hierarchical schematic in Orcad Capture. I understand that when nets from different schematics sheets are connected together in the hierarchy, they are added to a "flat net"....
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1answer
119 views

OrCAD: Uniqueness/Scope of Net Aliases, Busses, and Net Groups, Hierarchical Ports, and Off-page Connectors

I am using Allegro/OrCAD Capture. I need some confirmation about the scope of some various types of nets in Allegro/OrCAD Capture, particularly with regards to hierarchical design and projects with ...
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1answer
42 views

How can I simulate the circuit with floating node in Orcad simulation?

I simulated to test 4n25 optocoupler. 6 pin in 4n25 is base of output transistor. According to google, 6 pin can be not connect pin (NC) because input LED generate the base signal. Orcad ...
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1answer
42 views

Allegro padstack not showing my pads

I have implemented a schematic for an IC (BGM13S32F512GA-V2R) and I am trying to create a footprint but when I try to place the padstacks, they do not appear in the default library... so I went into ...
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5answers
1k views

How should chips with pins on bottom be drawn?

When you are drawing a schematic for an IC, and there are pins in the bottom center (in my case I am drawing for the BGM13S32F512GA-V2R), how should they be drawn? I have looked into some beginner ...
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1answer
180 views

iv plot for NPN BJT

I have done a “parametric sweep” of the DC voltage source VCC ranging from 0 to 30 V and on the current source with values of iB = 0,50,100,150,200, and 250 µA. Below is the plot iC vs vCE (vCE being ...
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1answer
31 views

Orcad search using Tcl

I mostly use Orcad Lite to browse schematics, doing a lot of component/net search. How can I search using Tcl console?
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32 views

OrCAD CIP CIS Part number

I have added some parts using CIP function in OrCAD and they can be added in Schematics as well. Problem is when i look at part manager window of that schematics, those parts have not been assigned ...
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41 views

OrCad IBIS to PSpice translator creates multiple models for my part

So I used the IBIS translator in PSpice Model Editor for an ADC (AD9343). it produces multiple .subckt models (one for Input, one for Output, one for IO,etc...). Now when im creating a part, it lets ...
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4answers
106 views

Can a PCB footprint be extracted from a solid model?

I usually just make a PCB footprint if I need it (Solidworks PCB, Altium, Protel99, OrCAD, etc). I'm an electrical engineer. I've seen very nice 3D solid models for some parts and I wonder if the PCB ...
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1answer
342 views

In OrCAD PCB Designer how do I get the trace width of a signal

In OrCAD PCB designer, how do I see the trace width of a signal? When I click the "i" or "Show Element" icon it gives me everything but the trace width.
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1answer
39 views

Hybrid library vs normal one

We use Orcad and we want to update our libraries. When we place a part and want to rotate it,we don't like the layout of the labels(names,values etc) and thus have to manually reposition them. It's ...
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1answer
307 views

Buck converter simulation in orcad

I am trying to simulate a Buck-converter circuit in Orcad, but no matter what I change the input voltage to I still get the same output voltage result. I tried this in Multisim and got the same issue. ...
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198 views

PSpice error: '*$' is not a model parameter name

I am using OrCAD PSpice Student Edition, version 9.0, fairly old version (1999) but its what we have access to. I've had this problem almost every time I use custom parameters for any model, which is ...
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1answer
121 views

Orcad Capture CIS, How to change transistor area?

If using the QbreakN and QbreakP, how could I change the relative emitter areas of each individual transistor. I need to match the parameters like in the figure below:
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195 views

Voltage Multiplier Problem

I´m working on a voltage multiplier with 5 stage, i´m using the same capacitor and i think that my problem is the current load but i actually think that with a resistor in the output of the multiplier ...
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1answer
230 views

What is the binary format of the OrCAD .OLB files?

I want to auto generate .OLB files for my own components, so I need to either use Orcad Capture scripting, or alternatively write the binary .OLB files myself. Is there anybody that have seen a ...
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1answer
84 views

How to show or print all the parts in an OrCAD library (OLB) file?

I have a .OLB file for OrCAD schematic where there are multiple part in. I an open the .OLB file using File => Open => Library, and I can also successfully place parts in a design. From previous ...
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1answer
41 views

Sine source outputting wrong signal

I was trying to simulate a circuit on Capture CIS lite, but I kept getting an output signal which was nothing like I expected. When I tried putting the probe on the sine source, it seems like the ...
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538 views

Orcad Schematic Capture. Instances vs Occurrences

Using Orcad capture to create a multi-page hierarchical schematic I used the "Annotate..." option to renumber all parts. First set the them to "?" then incrementally update them. However, after this ...
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4answers
211 views

What is a fast built in op-amp to use in OrCAD Pspice Capture? Or how can I design one?

I am trying to simulate a 100 kHz FitzHugh-Nagumo oscillator in OrCAD Pspice capture (this paper gives the motivation for the configuration, but is for a 180 Hz oscillator, https://ieeexplore.ieee.org/...
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1answer
71 views

Interpretation of Time Domain simulation output

I have the following circuit and I want to know the voltage on each node and the current on each loop. I've run the Time Domain simulation (I'm not sure of the differences between this and Bias Point ...
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1answer
60 views

How to Reconfigure a Current Sense Amplifier Pspice Model

I downloaded the .lib Spice library for the MAX4172 and imported it into OrCad, available from: https://www.maximintegrated.com/en/products/analog/amplifiers/MAX4172.html/tb_tab2 The library file ...
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2answers
71 views

Amplifier MOSFET (25m - 5V)

I dont know how to amplify a signal of 25mV to 5V amplitud signal ((frequency of audio input cell phone)). I have this circuit so far:
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3answers
659 views

Integrator (Op amp) Simulation OrCAD

I'm working on in a integrator op amp and actually i make the desing in a breadboard and is working but in time of simulation is like there is not voltage in the output of the op amp. I don't ...
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1answer
557 views

Differentiator (Op amp) with a square wave

I'm working on a differentiator (op amp) with a unitary gain i calculated the value of RC and the period with a frequency of (1kHz). Figure 1. Differentiator Schematic (OrCAD). This is the schematic ...
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1answer
70 views

Spice model search with advanced sorting functionality

Does anyone know of a search engine like Mouser/Digikey where you can narrow down parts based on voltage/package type/etc., but exclude all results without PSpice models? Unless I'm doing it all wrong,...