Biasing an Audio Transistor

Biasing an Audio Transistor

Category:

Science & Technology

Tags:

• Biasing
• Audio
• Transistor
• amplifier

[rschandran]

Thanks for the very elegant demo on the basics of biasing and amplification. I tried this experiment using basically your set up. I could not get a clean signal (severe clipping) for any of the R2 & R3 settings (through the full range) at the collector.

I have two questions. Does the beta of the transistor matter for your set up? Also if my signal input level matters in getting a clean output. I had a 1.2v rms sign wave at 1000 HZ as the input signal. Appreciate your response. Thx

[AllAmericanFiveRadio]

Thanks rschandran

Yes the beta does matter. The higher the beta, the higher the gain of the transistor. So a high beta transistor can be easier to over drive by the input signal. Everything is important in the circuit. I think the best/fastest way to learn is to study existing circuits of the type you want to build. A lot of time and experimenting has gone into a successfully executed circuit.

[Mrluke1308]

You explain things in such a smooth, calm, easy way that it's understandable, thanks!

[AllAmericanFiveRadio]

Thanks Mrluke1308

[myworldismine72]

Hello i really like your video

You explain verry well

Can you make one video for the 555 timer

cause all the tutorial on the internet not explain well like you

[AllAmericanFiveRadio]

Thanks myworldismine72

I'll put the 555 timer on my YouTube todo list.

[ravneetpalsingh]

Amazing video sir. If you can show the working of R1 and C1 in another vid, it would be great.

[smiley235]

Great video. And as someone mentioned earlier, very pleasant to listen to and easy to follow, thumbs up from me

[AllAmericanFiveRadio]

Thanks cumesoftware

[AllAmericanFiveRadio]

@flurng

R1 produces a voltage drop for the emitter which produces a bias voltage for the base. C1 stabilizes this voltage. Without C1 the bias voltage will change more when current flows through E and C of the transistor. The more the bias voltage changes, the more the the current flow is influenced by the current through the transistor changing the characteristics of the amplifier.