Electronics Area – Electrical and Electronics Tutorials and Circuits
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Electrical and Electronics Tutorials and Circuits
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Signal Generators
Introduction to Signal Generators The function of a signal generator is to produce time a dependent signal with some special characteristics of frequency, amplitude and shape. Sometimes these features are controlled externally throughout control…
MOSFET transistor – Saturation and breakdown regions
Saturation region of a N channel Mosfet transistor The NMOSFET transistor behaves as a voltage controlled current source VGS. Check the following equations: where ß = K (W/L) In this region, the quadratic…
JFET Saturation and Breakdown regions
JFET Saturation and Breakdown regions The JFET Saturation region In this region the JFET has some linear features that are used in amplification. These features are similar to those of a BJT in the…
JFET Cutoff and Linear regions
JFET Cutoff and Linear regions JFET Cutoff region In this region the current flowing from the Drain to the Source terminals of the JFET is zero (ID = 0). In this case, the voltage between…
Microwave Oven History
Microwave Oven History The microwave oven was discovered in 1947 by Percy Spencer. Mr. Percy Spencer, an engineer of the Raytheon Company, was carrying in his jacket pocket a bar of…
What is a Binary Decoder?
The binary decoder is a device that accepts a digital input (in binary form) and it activates one of its outputs. This device has several outputs, and the one that is activated is chosen by the code applied to the inputs.
What is a Logic Circuit?
A Logic circuit uses two logic levels to transfer the information. A high logic level or “1” and a low logic level or “0”. The Logic circuits are made of digital elements such as the AND gate, the OR gate, the NOT gate and a combinations of them.
Polarization of a conducting material
If an electric field is close to a metallic body, part of it is positively charged and other part negatively charged
Electric Field – Lines of Force – Electric Field Unit
If a charge Q is affected by an electrostatic force, there is an electric field. If at some point the electric field is known, we can find the electrostatic force on a charge Q at that point
Positive and Negative Charges – (electrons, protons, neutrons)
If a body has more electrons than protons, it is negatively charged. If it has more protons than electrons it is positively charged
Norton’s Theorem
Norton’s Theorem The Norton’s Theorem is similar to the Thevenin’s Theorem. It can be seen that, the equivalent circuit is: A Voltage source (Thevenin voltage: Vth) in series with a resistor (Thevenin resistance: RTH) Thevenin…
Thevenin’s theorem
The Thevenin’s theorem is used to convert a two terminal circuit, into a very simple circuit containing one voltage source in series with a single resistor