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BJT audio amplifier - CircuitLab
https://www.circuitlab.com/circuit/6syafk/bjt-audio-amplifier/
BJT audio amplifier - CircuitLab BJT audio amplifier PUBLIC Summary A one-transistor amplifier, intended to amplify audio picked up by a piezoelectric transducer. Link & Share Copy and paste the appropriate tags to share. CircuitLab Circuit URL (e-mail, IM, blog, etc.): Open in editor Print/Export Description
BJT as an Amplifier - The Engineering Knowledge
https://www.theengineeringknowledge.com/bjt-as-an-amplifier/
BJT Voltage Amplification As we know that Ic=βI b that mean current is amplified. In transistors, the value of base current is less ac compare to emitter and collector current so emitter and collector currents are almost equal. By keeping in mind this discussion lets have a look at this below given circuitry.
EETimes - Discrete audio amplifier basics - Part 1 ...
https://www.eetimes.com/discrete-audio-amplifier-basics-part-1-bipolar-junction-transistor-circuits/
The stage gain of a BJT, used as a simple amplifier, can be determined from the relationship: V out / V in = h fe R L / ( R S + r i ) where R S is the source resistance, R L is the collector load resistor, h fe is the small-signal (AC) current gain, and r i is the internal emitter-base resistance of the transistor.
bJT as an amplifier Project | Transistor Amplifier | Mini ...
https://techatronic.com/transistor-amplifier-circuit-using-bc547-transistors/
A transistor amplifier is used to amplify the low input audio signals. We can take the low input signals from the audio jack of smartphones or PCs and convert them into high-quality amplified output signals which are given to an external speaker. An external power supply is also needed to boost up the output audio.
transistors - Question about bjt audio amplifier circuit ...
https://electronics.stackexchange.com/questions/316839/question-about-bjt-audio-amplifier-circuit
Thats a simple audio amplifier transistor/bjt circuit. I wonder why the capacitor C1 is used in the circuit when ac variations from the mic can be superimposed on dc directly in many ways. Secondly why voltage divider bias is used usually to make the audio amplifiers.
BJT Amplifiers 6 - Pearson
https://www.pearsonhighered.com/assets/samplechapter/0/1/3/4/0134420101.pdf
The things you learned about biasing a transistor in Chapter 5 are now applied in this chapter where bipolar junction tran- sistor (BJT) circuits are used as small-signal amplifiers. The term small-signalrefers to the use of signals that take up a relatively small percentage of an amplifier’s operational range.
Are BJT best for audio output transistors? why? | diyAudio
https://www.diyaudio.com/community/threads/are-bjt-best-for-audio-output-transistors-why.379958/
You must need to know this about BJTs. 1. They are good in a comparatively low unity gain frequency designs because fast of them (like 2SC5200, MJL3281, 2SC2922) have too high dependance of transition frequency versus flowing current while slow of them (MJL21194, BD911) have too low widebandness for modern designs. 2.
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