Common Emitter BJT Amplifier Design Current Mirror Design


Some Random Observations
● Conditions for stabilized voltage source biasing
● Emitter resistance, RE, is needed.
● Base voltage source will have finite resistance, RB.
● needs to be much larger than RB.
● Small RB - relative to RS - will attenuate input signal.
● Larger RE permits larger RB, but results in lower gain.
● Gain = -RC/RE for RE >> re.
● Split RE with bypassing increa ....etc

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CHAPTER 1
DEFINITION
1.1 Definition
“Audio amplifier is defined as the device which is used to convert the audio signal into a electrical signal and then amplify it to a specific level.”
Or
“Audio amplifier is a device which selects the frequency of audio range i.e. 20Hz to 200 kHz and amplifies that frequency signal.”
Audio amplifier works with some basic components of electronics these are microphone, operational amplifier, transistors & speaker. The microphone collects the audio signal an ....etc

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CLASS-D AMPLIFIERS
Abstract
Class D amplifiers present us with a revolutionary solution, which would help us eliminate loss and distortions caused due to conversion of digital signals to analog while amplifying signals before transmitting it to speakers. This inchoate piece of knowledge could prove to detrimental in improving and redefining essence of sound and take it to a different realm.

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Author: Dr. Alfred Yu

Abstract

This is broadly centered around the topic of biomedical circuits. Its overall aim is to provide biomedical or electronic engineering students with a hands-on opportunity to develop an electrocardiogram (ECG) amplifier circuit from scratch and thereby learn more about the technical details of bio-potential measurement devices.

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