8023.doc - Topic 2.4.2 Rectification Learning Objectives At...

This preview shows 1 out of 4 pages.

Topic 2.4.2 – Rectification. Learning Objectives: At the end of this topic you will be able to; draw and understand the use of diodes in half wave and full wave bridge rectifiers; calculate the peak value of the output voltage of half wave and full wave rectifiers given the rms input voltage. 1
Image of page 1

Subscribe to view the full document.

Module ET2 Electronic Circuits and Components. Rectification. In the previous section we discussed the use of alternating current to form the basis of a power supply for electronic components. In that section we learnt the difference between peak and rms voltage. At the end of the section we posed an interesting problem which was that if an alternating current supply is to be used to power modern electronic circuits then we must have a way of changing a.c. into d.c. There are a couple of stages in the conversion process, and we will consider the first of these in this topic – the process of rectification. To achieve this we will need to use one of the components we met in Topic 2.3, and this is the silicon diode. You should remember from our previous work that the diode has the following characteristic, i.e. only allows current to flow in one direction. 2 Cathod e Anode Conventional current flows in this direction.
Image of page 2
Topic 2.4.2 – Rectification. Now we will consider what happens when an a.c. source is applied to a silicon diode. The graph from the oscilloscope below shows the effect of diode on the a.c. voltage. The blue trace, shows the output from the step down transformer or a.c. voltage source, and the red trace shows the output after the diode. There are a couple of things to notice from the graph: i. The negative part of the a.c. graph has been removed. ii. The voltage across the resistor is now a variable voltage d.c.
Image of page 3

Subscribe to view the full document.

Image of page 4
You've reached the end of this preview.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern