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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.
Best BJT for audio applications | diyAudio
https://www.diyaudio.com/community/threads/best-bjt-for-audio-applications.141310/
Also the 2n5401 /2n5501 are great for super high rails. but have higher Cob. (MPSA 92/42 are the same). The BC's Evil mentioned are very widely available. and work well for lower voltage amps ( or if you. use a cascoded LPT with a HV amp). Everyone seems to go for faster transistors , but sometimes.
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.
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