By Tadej Tuma
This ebook is the 1st whole consultant to analog circuit layout utilizing the circuit simulator software program package deal SPICE OPUS. built by means of the authors and utilized by lecturers and pros all over the world, SPICE OPUS is a stronger model of the well known collage of California at Berkeley circuit simulator SPICE3 that has been freely to be had on-line on account that 2000.
Aimed at beginners in addition to expert circuit designers, the publication is a distinct mix of a easy advisor to basic analog circuit simulation and a SPICE OPUS software program guide. All simulations in addition to the loose simulator software program might be without delay downloaded from the SPICE OPUS homepage: www.spiceopus.si.
The publication is split into 3 parts:
* Theory (Chapters 1 and 6): encompasses a dialogue of uncomplicated mathematical notions of circuit research, via particular algorithms applied in SPICE OPUS.
* Crash course (Chapters 2 and 7): starts off with a quick set up consultant after which strikes fast via a regular circuit simulation situation, in line with an easy instance. The reader with a few basics in electric engineering might proceed with a few whole simulation periods awarded in bankruptcy 7.
* Reference guide (Chapters three, four, and 5): Describes all gains of SPICE OPUS in a well-structured, methodical approach, beginning with enter dossier syntax, via circuit research tools and the integrated scripting language (NUTMEG).
Circuit Simulation with SPICE OPUS is meant for a large viewers of undergraduate and graduate scholars, researchers, and practitioners in electric and platforms engineering, circuit layout, and simulation improvement. The booklet can be utilized as a textbook for a complicated undergraduate or graduate path on circuit simulation in addition to a self-study reference consultant for college kids and researchers alike.
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Additional resources for Circuit Simulation with SPICE OPUS: Theory and Practice
Let’s take a look at the voltage at node 2. 837273e+000 This is the potential of node 2 in volts (2:8 V). The potential of node 0 is assumed to be 0 V. As we can see, the amplifier is in the class A operating region because the operating point of the output is between the highest and the lowest voltage in the circuit. When SPICE calculates the operating point of the circuit, it actually solves a set of nonlinear equations that describe the circuit in Fig. 3. This circuit is the DC model of the circuit in Fig.
We will get back to default scales when we work with graphs, but for now just ignore it. Let’s take a look at the voltage at node 2. 837273e+000 This is the potential of node 2 in volts (2:8 V). The potential of node 0 is assumed to be 0 V. As we can see, the amplifier is in the class A operating region because the operating point of the output is between the highest and the lowest voltage in the circuit. When SPICE calculates the operating point of the circuit, it actually solves a set of nonlinear equations that describe the circuit in Fig.
Two additional noise signals appear at the p–n junction: shot noise and flicker noise (1=f noise). Shot noise is caused by the random fluctuations of the diode current. The fluctuations occur because the current consists of a flow of discrete charges (electrons). t /). 106) where Kf is the flicker noise coefficient and Af is the flicker noise exponent. 107) Noise models of other circuit elements are similar to the diode noise model, where the noise is modeled as a noise current source with a given power spectrum density (see Fig.