ktuedalab

V I Characteristics of Diodes Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will plot the V-I characteristics of Si and Ge diodes and understand the difference in cut in voltage and slope of the characteristics. Theory Semiconductor diode is a $p-n$ junction that conducts well on forward bias and conducts very little on reverse bias. The relation between diode current and voltage is \begin{equation}\label{diodeeqcurrent} I=I_{o}[e^{\frac{V_{D}}{\eta V_{T}}}-1] \end{equation} where $I_{o}$ is the reverse saturation current, $V_{D}$ is the voltage across the diode and $V_{T}=\frac{kT}{q}$. $k$ is the Boltzmann constant and $T$ is the absolute temperature. The ideality factor $\eta$ varies from $1$ to $2$. Experiment - Forward Characteristics Qucs is launched and the components in the schematic, shown below, are entered into the editor. A Si diode ...

RC Integrator and Differentiator using QUCS Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will understand the operation of simple integrator and differentiator circuits using QUCS You will learn the frequency response characteristics of integrator and differentiator by dint of ac simulation. Theory Differentiator is a high pass circuit that produces the time derivative of the input signal at the output. The circuit is shown below. \begin{equation} \nonumber v_{o}=I_{o}R=RC\frac{d(v_{s}-v_{o})}{dt}\\ ...

SPICE Simulation of Voltage Divider Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will wire up a voltage divider network using QUCS You will learn to perform DC, AC and transient simulations on the developed circuit. you will learn to observe, store and export the data from the display ( .dpl ) file. Experiment Launch QUCS. Go to Components in the left pane and select the item Lumped Components . Drag and drop a resistor onto the schematic window. Right click on on to and go to Edit properties and make the resistance 1 k&#937 Right click, copy and paste this resistor twice. Connect the three resistors in series by wires, selected by pressing Cntrl+E . Go to Components in the left pane and select Sources &#8594 ac Voltage Source . Drag and drop the source onto the schematics window. Right click on the source and change ...

Overview of EDA Tools Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will familiarize the SPICE tool QUCS Quite Universal Circuits Simulator(QUCS) Quite Universal Circuits Simulator(QUCS) is an open source circuit simulation software, based on SPICE, that is built on the QT4 platform, that is especially useful in the simulation of high frequency circuits. The schematics of analog and digital circuits can be entered into the schematics editor and wired together and be subjected to the following simulations. DC simulation Transient simulation AC simulation S-parameter simulation Parameter sweep simulation Harmonic balance Digital simulation Optimization Installation of QUCS QUCS is installed on Ubuntu using the instructions here The executables for Qucs for Windows can be do...