Physics Help needed!!!!

Discussion in 'Off Topic [BG]' started by katri, Apr 26, 2009.

1. katri

Aug 4, 2005
Birmingham, England
Can any one help me with some physics calculations, i need to know hot to work out the gain of a transistor and a darlington pair. if anyone could help i would greatly appericiate

2. fdeckSupporting MemberCommercial User

Mar 20, 2004
HPF Technology LLC
Do you mean, the gain of an amplifier with these components in it, or of the components themselves? To get started, think if you know a rule of thumb, for what "beta" means for a transistor.

3. katri

Aug 4, 2005
Birmingham, England
I'm looking for a formula for calculating the gain of a single transistor. I meausred the voltages across the C-B, B-E and C-E and i have a set of results can i get the gain from this?

4. Finsterino

Mar 8, 2007
Florida
Well let's see: if the input is a sine wave of .1V P-P, and the output shows 1 V P-P, that is a gain of 10.

Want that in dB?

5. TrooperFarva

Nov 25, 2004
New City, NY
All I remember from digital circuits is that the current gain is equal to the collector current divided by the base current. I don't know what other results you have from the voltages, but if you can calculate the currents, you should be able to get the gain really easily.