TECHNOLOGICAL INSTITUTE OF THE PHILIPPINES938 Aurora Blvd.,Cubao, Quezon City

Experiment No. 2

Submitted by:Date Submitted:Abalos, Leigh AnnDecember 12, 2014Abitria, Mikaela RosebienAlvarez, Ganimid Jr. Arias, RhodoraBacani, AlyzaSantolorin, MaicaEC32FB1

Engr. Dennis Jefferson AmoraInstructor

DATA AND RESULTSData Table:FrequencyTime/DivisionVolts/Division

Half-Wave Rectifier60 Hz200 microsecond1:10

Full-Wave Rectifier600 Hz200 microsecond1:1

The table shows the values set in the function generator and oscilloscope to get the desired waveform of the rectifiers

Figure 2.1 Half-Wave Rectifier Schematic Diagram

Figure 2.1.2 Waveform output for Half-wave Rectifier

Figure 2.2 Full-Wave Rectifier Schematic Diagram

Figure 2.2.2 Waveform output for Full-wave Rectifier

IntroductionAccording to a quotation by Carl Jung, resistance to the organized mass can be affected only by the man who is as well organized in his individuality as the mass itself. It means that resistances in a circuit depend on the alignment to the position of the other given elements at the diagram and the circuit itself. Schematic diagrams of electric circuits are used as patterns on building the circuit that works. In this lab activity two schematic diagrams are given to us and we must construct the same set-up with the use of the materials provided: four diodes, one 10000 ohms resistor, a breadboard, connecting wires and probes, function generator, and the oscilloscope. We will analyze the functions of each material, make a set-up out of it, and produce a sine wave that must be same on the given expected results for each diagram.Rectification is the process where a rectifier converts an alternating current to a direct current power. It only allows one flow of electrons. A rectifier is very useful equipment for a DC power supply; it is because you cannot run electronic equipment without a DC power supply because it energizes all electronic circuits like amplifiers, oscillators and etc. Essentially rectifier needs unidirectional device. Diode has unidirectional property hence suitable for rectifier. Rectifier broadly divided into two categories: Half wave rectifier and Full wave rectifier.

A Half Wave Rectifier Circuit

Half wave rectifier requires only a half cycle of applied AC voltage. It has only one diode in which conducts during positive cycle. During positive half cycle of the input voltage anode of the diode is positive compared with the cathode. During negative half cycle of input voltage, anode is negative with respected to cathode and diode is in reverse bias. No current passes through the diode hence output voltage is zero.

A Full Wave Rectifier

A full wave rectifier, also known as the bridge rectifier, is a circuit, which converts an AC voltage to DC voltage using both half cycles of the input AC voltage. The circuit has four diodes connected to form a bridge. The AC input voltage is applied to the diagonally opposite ends of the bridge. The load resistance is connected between the other two ends of the bridge.For the positive half cycle of the input AC voltage, diodes D1 and D2 conduct, whereas diodes D3 and D4 remain in the OFF state. The conducting diodes will be in series with the load resistance RL and hence the load current flows through RL. For the negative half cycle of the input AC voltage, diodes D3 and D4 conduct whereas, D1 and D2 remain OFF. The conducting diodes D3 and D4 will be in series with the load resistance RL and hence the current flows through RL in the same direction as in the previous half cycle. The sine wave that we will be generating on the oscilloscope with the circuit that we will construct will be compared to the expected output sine wave that is given. This lab activity will determine our knowledge about the topics discussed and its application.

OBJECTIVE(S):The course activity aims to understand the concept of rectification, learn and analyse the nature of Half-Wave and Full Wave Rectifier and differentiate the two.