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Tag - Electrical engineering

Op AMP Voltage
  • Electrical

Op AMP Voltage Comparator – theteche.com

May 25, 2023
by Santhakumar Raja
1 min read
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If both inputs of the op amp shown in Fig. 1 are used simultaneously, then from equation, the output voltage is given by: Vo = Ao(V2 − V1) When V2 > V1 then Vo is positive, its maximum value being the positive supply...

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Introduction to Operational Amplifiers
  • Electrical

Introduction to Operational Amplifiers

May 25, 2023
by Santhakumar Raja
2 min read
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Operational Amplifiers (usually called ‘op amps’) were originally made from discrete components, being designed to solve mathematical equations electronically, by performing operations such as addition and division in...

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Two Port Networks
  • Electrical

Two Port Networks and Characteristic Impedance

May 25, 2023
by Santhakumar Raja
2 min read
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Networks in which electrical energy is fed in at one pair of terminals and taken out at a second pair of terminals are called two port networks. The network between the input port and the output port is a transmission network for...

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Maximum Power Transfer Theorem
  • Electrical

Maximum Power Transfer Theorem

May 24, 2023
by Santhakumar Raja
1 min read
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The maximum power transfer theorem states: The power transferred from a supply source to a load is at its maximum when the resistance of the load is equal to the internal resistance of the source. Hence, in Fig when R = r the...

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Typical BJT Characteristics and Maximum Ratings
  • Electrical

Typical BJT Characteristics and Maximum Ratings

May 23, 2023
by Santhakumar Raja
1 min read
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Table summarises the characteristics of some typical bipolar junction transistors for different applications, where IC max is the maximum collector current, VCE  max is the maximum collector – mitter voltage, PTOT max is...

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  • Electrical

Bipolar Junction Transistors (BJT)

May 21, 2023
by Santhakumar Raja
1 min read
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Bipolar junction transistors generally comprise n-p-n or p-n-p junctions of either silicon (Si) or germanium (Ge) material. The junctions are, in fact, produced in a single slice of silicon by diffusing impurities through a...

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Conduction in Semiconductor Materials
  • Electrical

Conduction in Semiconductor Materials

May 21, 2023
by Santhakumar Raja
1 min read
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Arsenic, antimony and phosphorus have five valency electrons and when a semiconductor is doped with one of these substances, some impurity atoms are incorporated in the tetrahedral structure. The ‘fifth’ valency electron is...

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Introduction to Electromagnetic Induction
  • Electrical

Introduction to Electromagnetic Induction

May 16, 2023
by Santhakumar Raja
2 min read
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When a conductor is moved across a magnetic field so as to cut through the lines of force (or flux), an electro motive force (e.m.f) is produced in the conductor. If the conductor forms part of a closed circuit then the e.m.f...

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typical loudspeaker having a magnetic circuit comprising a permanent magnet
  • Electrical

Force on a Current Carrying Conductor

May 15, 2023
by Santhakumar Raja
2 min read
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If a current-carrying conductor is placed in a magnetic field produced by permanent magnets, then the fields due to the current-carrying conductor and the permanent magnets interact and cause a force to be exerted on the...

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Telephone receiver
  • Electrical

What are Electromagnets?

May 15, 2023
by Santhakumar Raja
3 min read
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The solenoid is very important in electromagnetic theory since the magnetic field inside the solenoid is practically uniform for a particular current, and is also versatile, inasmuch that a variation of the current can alter the...

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