Question

discussion for biasing circuit pspice report

Answer 1

Pspice is a circuit simulation computer used to analyze circuits and other factors for electronic circuitry like biasing, stability, load. Biasing means giving predetermined voltages or currents at various points of an electronic circuit for the purpose of establishing proper operating conditions in electronic components. In simple words providing a voltage that overcomes or restricts the flow of carrier in semiconductor.No current will flow when any semiconductor is unbiased.

Biasing applied on various electronic components like a transistor, diode, and circuit designs like a voltage divider, BJT.

First opened the PSpice OrCAD software then open a new project and give a name to blank project BJT biasing.

on the software, dashboard go to places option then goto PSpice components

Now design the BJT biasing circuit according to the circuit diagram on the PSpice design board and give the values according to practical notes.

set the bias voltage or current to your circuit.

Then go to the simulation setting and goto analysis tab.

Then goto analysis type option and choose bias point then ok.

the software will generate bias points when the simulation starts and the graph is generated for both input characteristics and output characteristics.

The characteristic curves predict the performance of a BJT. There are three curves, an input characteristic curve, a transfer characteristic curve, and an output characteristic curve.. The output characteristic curves for a BJT are a graph displaying the output voltages and currents for different input currents. For use as a switch, a transistor these conditions are known as "cut-off" and "saturation".

Output characteristic – the variation of the collector current (I_C) with the collector-emitter voltage (V_CE)After the initial bend, the curves approximate a straight line. The slope or gradient of each line represents the output impedance, for a particular input base current

Input characteristic – the variation of the base current (I_B) with the base-emitter voltage (V_BE).