Table of Contents
What is base modulation?
[′bās ‚mäj·ə′lā·shən] (electronics) Amplitude modulation produced by applying the modulating voltage to the base of a transistor amplifier.
What is known as base width modulation?
#Base width modulation/Early effect is basically the variation in the width of the base in a bipolar transistor due to a variation in the applied base-to-collector voltage. #For example a greater reverse bias across the collector-base junction increases the collector-base depletion width.
Why is base made thin?
The base region in a transistor is made very thin so that there is a better conduction of majority carriers from emitter to collector through base. Due to it, the base current is quite weak, the collector current is nealy equal to the emitter current.
What is transistor and why it is called like that?
The word transistor is a combination of transfer and resistance. This is because it transfers the resistance from one end of the device to the other end or we can say, transfer of resistance. Hence, the name transistor. Transistors have very high input resistance and very low output resistance.
What is base width modulation early effect in transistor Mcq?
The phenomenon known as ‘Early effect’ in a bipolar transistor refers to a reduction of the effective base-width caused by. Electron-hole recombination at the base. The reverse-biasing of the base-collector junction. The forward-biasing of the emitter-base junction.
How base width modulation affect the performance of the transistor?
Early effect or base width modulation: The early effect is the variation in the width of the base in a bipolar transistor due to a variation in the applied base-to-collector voltage. For example a greater reverse bias across the collector- base junction increases the collector-base depletion width.
What is the need for modulation?
Need For Modulation in Communications System. Modulation is a signal-processing operation that is basic to the transmission of an information-bearing signal over a communication channel, whether in the context of digital or analog communications.
What is depth of modulation?
The modulation index (or modulation depth) of a modulation scheme describes by how much the modulated variable of the carrier signal varies around its unmodulated level. It is defined differently in each modulation scheme.
What is baseband modulation?
Modulation. The aim of digital baseband modulation methods, also known as line coding, is to transfer a digital bit stream over a baseband channel, typically a non-filtered copper wire such as a serial bus or a wired local area network .
What is significance of modulation index?
significance of modulation index. It is used to determine the strength and quality of transmitted signal. If the modulation index is small, then the amount of variation in the carrier amplitude is small. Thus, the audio signal transmitted willnot be strong.