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Thermal Runaway
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Thermal Runaway

Thermal Runaway When the transistor is  operational , almost  the whole  heat is produce at the collector-base junction. This power dissipat...

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Transistor Audio Power Amplifier
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Transistor Audio Power Amplifier

Transistor Audio Power Amplifier     A transistor amplifier which raises the power level of the signals that have audio frequency range is k...

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Direct-Coupled Amplifier
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Direct-Coupled Amplifier

Direct-Coupled Amplifier      There are many applications in which extremely low frequency (< 10 Hz) signals are to be amplified e.g. amp...

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Transformer-Coupled Amplifier
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Transformer-Coupled Amplifier

Transformer-Coupled Amplifier   The main reason for low voltage and power gain of RC coupled amplifier is that the effective load (R AC ) of...

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Multistage Transistor Amplifier
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Multistage Transistor Amplifier

Multistage Transistor Amplifier     A transistor circuit containing more than one stage of amplification is know as multistage transistor am...

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Classification Of Amplifiers
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Classification Of Amplifiers

Classification Of Amplifiers     Classification Of Amplifiers-The transistor amplifiers may be classified as to their usage, frequency capab...

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Swamped Amplifier
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Swamped Amplifier

Swamped Amplifier     Fig. 1 shows the circuit of a swamped amplifier. Note that d.c. emitter resistance R E is divide into two parts viz. ...

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Input Impedance of CE Amplifier
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Input Impedance of CE Amplifier

Input Impedance of CE Amplifier     When one CE amplifier is being used to drive another, the input impedance of the second amplifier will s...

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Voltage Gain of Common Emitter Amplifier
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Voltage Gain of Common Emitter Amplifier

Voltage gain of common emitter amplifier     The voltage gain (A v ) of an amplifier is equal to a.c. output voltage (v out ) divided by a....

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A.C. Emitter Resistance
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A.C. Emitter Resistance

A.C. Emitter Resistance     A.C. Emitter Resistance-The ac or dynamic resistance of emitter-base junction diode of a transistor is called ac...

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Load Line Analysis
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Load Line Analysis

Load Line Analysis     The output characteristics are determined experimentally and indicate the relation between V CE and I C . However, t...

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How Transistor Amplifies
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How Transistor Amplifies

How Transistor Amplifies     How Transistor Amplifies -Fig-1 shows a single stage transistor amplifier. When a weak a.c. signal is given to ...

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Transistor Biasing
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Transistor Biasing

Methods of Transistor Biasing     In the transistor amplifier circuit drawn so far biasing was done with the aid of a battery V BB which w...

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Stability Factor
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Stability Factor

Stability Factor     It is desirable and necessary to keep I C constant in the face of variations of I CBO (sometimes represented as I CO )...

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Refrigerator & Refrigeration cycle: How does It Work?
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Refrigerator & Refrigeration cycle: How does It Work?

Refrigerator &amp; Refrigeration cycle: How does It Work?     Refrigerators are one of the prime appliances that we utterly rely on in o...

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Stabilisation
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Stabilisation

Stabilisation   The collector current in a transistor changes rapidly when. (i) the temperature changes, (ii) the transistor is replaced by ...

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Transistor Biasing
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Transistor Biasing

Transistor Biasing     Transistor biasing-It has formerly been bandied that for faithful modification, a transistor amplifier must satisfy t...

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Faithful Amplification
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Faithful Amplification

Faithful Modification     The process of raising the strength of a weak signal without any change in its general shape is known as faithful ...

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