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General Category => Analog discussion => Topic started by: FrED on March 07, 2008, 06:49:40 AM

Title: Two amplifiers connected in series
Post by: FrED on March 07, 2008, 06:49:40 AM
This is a question that came up to me when i was studing some things for amplifiers.

I read that if you connect two transistor amplifiers in series, the total power you get is the multiplication of these two. For example, if you have a transistor that ampifies 10 times and another transistor that amplifies another 10 times, connecting them together gives you an amplification of 100!

Is it so easy to have amplification power?
Title: Re: Two amplifiers connected in series
Post by: kam on March 07, 2008, 16:30:39 PM
Yes actually you are right. Amplification is multiplied. But if you connect an allready amplified signal to an improper transistor, all you will get is a very loud noise.

There are limitations in transistor amplificaion gain and input. These limitations unfortunately makes a HiFi amplifier so hard to make. :(
Title: Re: Two amplifiers connected in series
Post by: FrED on March 07, 2008, 18:41:37 PM
And what about OP-Amps?
Title: Re: Two amplifiers connected in series
Post by: kam on March 09, 2008, 22:33:47 PM
Rules are rules and laws are laws. Otherwise, why do you think people give a shitload of money for 200-300 or 400watts Hi-Fi amps?
Title: Re: Two amplifiers connected in series
Post by: Andre on March 11, 2008, 07:56:31 AM
Imagine, 10 transistor connected in series, 1000 Watts! WOW
Title: Re: Two amplifiers connected in series
Post by: ScubaCap on March 13, 2008, 00:20:06 AM
Lol  ;D

Nice example man!
Title: Re: Two amplifiers connected in series
Post by: FrED on March 22, 2008, 02:27:15 AM
ok ok i got the point.