Monthly Archives: November 2014

Timesaving Techniques & Block Editing

proteus7.8 tutorial

Timesaving Techniques & Block Editing   Armed with all of the basic techniques we can now look at the other blocks of circuitry on the front sheet of the design, practice what we have covered so far and introduce a couple of new timesaving techniques. Let’s start by drawing the …

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Part Labels and Annotation

Choose to Hide or show references and values

Part Labels and Annotation:   You should see that all the parts you have placed have both a unique reference and a value. The reference is set by a feature of ISIS called [[Real Time Annotation which can be found on the Tools Menu and is enabled by default. Basically, …

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Power Connections

Editing hidden power pins

Power Connections:   ISIS supports a powerful scheme for making power connections implicitly, thus vastly reducing the number of wires on the schematic. There are three main concepts involved that we will discuss in turn below. Hidden Power Pins Almost all relevant parts in ISIS have their power pins hidden …

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Making Connection with Terminals

Completed block of circuitry

Making Connection with Terminals:   The final thing we need to do to complete this block of circuitry is label the terminals. Terminal naming is extremely important as it denotes the connection to be made. We could name the terminals in any fashion we liked but sensible names make the …

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Wiring Up on proteus-7.8

24LC64 Circuitry

Wiring Up:   Having placed all the requisite components we now need to wire them together. There are three main techniques used to help make wiring a circuit as simple and quick as possible : Modeless Wiring There is no ‘wiring mode’ in ISIS – wires can be placed and …

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Placing Objects on the Schematic

Removing a selection area

Placing Objects on the Schematic: Having selected the parts we need the next thing is to actually place them on the drawing area – the Editing Window – and wire them together. You’ll notice from the screenshot that we have also split the contents of the schematic into logical blocks …

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Selecting Parts from the Library

Selecting Parts from the Library

Basic Schematic Entry: We’ll start the tutorial by familiarizing ourselves with the basics of schematic design; picking components from the libraries, placing them on the schematic and wiring them together. The design in question is relatively large and there is therefore a reasonable amount of drawing involved. We provide a …

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OrCAD PSPICE – Frequency Response of the Amplifier

sweep on this profile

Frequency Response of the Amplifier:   1. Create a new simulation profile called for the circuit called “Frequency Response.” Inherit this profile from the base profile “steadystate.” 2. Do an AC sweep on this profile as follows: 3. Recall that the VSIN component is a dual-purpose signal source – it …

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OrCAD PSPICE – Compliance Evaluation

simulation profile

Compliance Evaluation:   To perform a compliance test of an amplifier, we gradually increase the input signal amplitude until clipping is observed at the amplifier output. We can “sweep” the VSIN amplitude in our circuit to achieve this. 1. Create a new simulation profile called “Compliance Test.” Inherit the profile …

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OrCAD PSPICE – DC Parametric Sweeps

simulation profile

DC Parametric Sweeps:   It is also possible to vary the parameters in a DC-swept fashion. Common examples of parameters that can be varied include resistance, capacitance, transistor Beta, and so on. A good example of this is to demonstrate the maximum power transfer theorem, where the  load resistance of …

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