michaeltotal.blogg.se - Beta to the max

It differs from the electron in its origin. The beta particle has the same mass and charge as an electron. L'Annunziata, in Radioactivity, 2007 2.1 INTRODUCTION

hFE is found on the datasheet (also known as beta/gain) as highlighted in the above datasheet.Michael F.

He then adjusts the collector/emitter current to be hFe * Ib. Per Transistor Man looks at the current going from the base to the emitter. If we look further into this, beta/hfe/gain = the ratio of the current going through the collector/the current through the base. Otherwise you get noise caused by saturation and clipping of the signal Now hFE and beta cannot be greater in value than allowed by the gain. This is possible if it works at its maximum gain BUT If you based the gain off of the maximum beta value instead of minimum: + + = 450…If all of the transistors were at their max, gain = 450 + + = 300…So even if it’s at its minimum, it still has enough gain A good rule of thumb is to build it using the minimum beta value instead of the max: So if you need to build an amplifier with a gain of 300, you set up 3 transistor stages.

(hFE = beta = gain for easier understanding) In the sheet above, it is also known as as hFE. When figuring out DC current gain, the beta value is part of the formula.

Per and Lancelot: A 2N3904 transistor’s beta max value is 150 and min value is 100. So I asked folks what their favorite transistor was for audio applications and instead of getting 10 different kinds, a few of them agreed on the 2N3904 (spoilsports :p).Īnyway so somehow they got to explaining how to find the DC current gain of a transistor based on its datasheet and such: So a bunch of the folks were talking about engineering and electronics and the like in our irc room and I got to talking about how engineers love smashing a whole bunch of letters and numbers together to make chip names sound ridiculous. 37 notes & NovemBeta? Hfe? Gain? 2N3904s! I think its transistor theory…