Design an audio signal amplification circuit using a triode.It is required to amplify the signal without distortion:

1. the signal source voltage is 10mV and the signal source internal resistance RS = 500Ω;

2. Amplification 1000 times;

3. Load resistance RL = 8Ω

 

here you go: http://www.r-type.org/articles/art-010h.htm

 

Design an audio signal amplification circuit using a triode.It is required to amplify the signal without distortion:

1. the signal source voltage is 10mV and the signal source internal resistance RS = 500Ω;

2. Amplification 1000 times;

3. Load resistance RL = 8Ω

The absolute maximum gain you will get from a triode valve is the value of μ.
There are no triodes with μ>125.
You would struggle to get a gain of 1000 from a pentode.
No triode can drive an 8Ω load. You would need a transformer.
Read Merlin Blencowe's book if you are interested in valve design.
https://www.waterstones.com/author/merlin-blencowe/1076386

 

Design an audio signal amplification circuit using a triode.It is required to amplify the signal without distortion:

1. the signal source voltage is 10mV and the signal source internal resistance RS = 500Ω;

2. Amplification 1000 times;

3. Load resistance RL = 8Ω

Where are these requirements coming from?

What does it mean "without distortion"?

There WILL be distortion, you need a spec on how much distortion is acceptable (which included indicating what kind of distortion).

 

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This is homework help, not homework done for you. You need to show your best efforts at developing a solution. A good start would be telling us what you already know.

 

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The absolute maximum gain you will get from a triode valve is the value of μ.
There are no triodes with μ>125.

A regenerative RF circuit can attain ridiculously high gain with a single triode or transistor.

But certainly not with no distortion.

 

A regenerative RF circuit can attain ridiculously high gain with a single triode or transistor.

But certainly not with no distortion.

I learned transistors first, and valves later out of curiosity “what are these weird high-voltage JFETs in glass tubes all about?”.
I have heard of regenerative circuits, but the TS did say “audio”, and regeneration (usually from microphones) in audio is not usually a good thing!

 

no amplification is possible without distortion. i think the question is worded poorly and should be clearer (no clipping etc.)

 

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Good 2!!

I thought about making that reply, but I decided against it since I may be on thin ice with the mods for some of my other posts that garnered less than congratulatory responses.