What is hFE value of a transistor?

What is hFE value of a transistor?

hFE of a transistor is the current gain or amplification factor of a transistor. hFE (which is also referred to as β) is the factor by which the base current is amplified to produce the amplified current of the transistor. The datasheets will normally specify whether the hFE value is for DC or AC current gain.

How do you calculate hFE?

Look at the Vce(sat) specification (page 3 of the datasheet, linked in Lorenzo’s answer) and notice the Ic and Ib values : For Ic=150mA, Ib=15mA. For Ic=500mA, Ib=50mA. In both cases, Ic/Ib = hFE = 10. hFE = 10.

What is hFE classification?

hFE is a transistor parameter that denotes its gain ratio. In technical terms, hFE for a transistor is the gain ratio of the collector current (output) divided by the base current (input). For example, if 200mA is produced in the collector circuit by a base current of 2mA, that transistor gain is 100.

What is the meaning of HFE?

Hybrid parameter forward current gain, common emitter

What is hoe in transistor?

hie – Input Impedance. hre – reverse voltage gain. hoe – Output impedance. All these are low frequency analysis parameters of BJT. The Value for these varies from one transistor to another and is provided by the manufacturer for characteristic analysis of a Transistor.

How do you calculate HFE of a transistor?

I = V/R = (12V – 0.2V)/100Ω = 118mA. Now calculate the needed base current required to turn on the transistor. Looking at the datasheet, Hfe could be as low as 30 at 100mA. The base current should then be IC/ Hfe = 118mA/30mA = 4mA.

What is current gain formula?

The current gain for a CB configuration is called Alpha, ( α ). In a BJT amplifier the emitter current is always greater than the collector current as IE = IB + IC, the current gain (α) of the amplifier must therefore be less than one (unity) as IC is always less than IE by the value of IB.

What is voltage gain?

[′vōl·tij ‚gān] (electronics) The difference between the output signal voltage level in decibels and the input signal voltage level in decibels; this value is equal to 20 times the common logarithm of the ratio of the output voltage to the input voltage.

What should LPF be set at?

As a general rule, the Low-Pass Filter should be set at a value approximately equal to (or below) 70% of your main speaker’s lowest frequency response. For example, your speaker’s frequency response goes down to 43Hz. 70% of 43Hz equals 30.1, so you should set the subwoofer’s low pass filter to 30Hz.

Whats the difference between gain and volume?

So remember: gain and volume are very similar concepts, but their difference is very important to your mix. Volume is how loud the OUTPUT of the channel or amp is. Gain is how loud the INPUT of the channel or amp is. It controls tone, not loudness.

Is gain the same as overdrive?

Gain is the amount of distortion(signal clipping) added to the signal. Overdrive is just a form of distortion, its a mild form mostly used to over drive the tubes of a tube amp to get a nice tube amp crunch.