# formula of collector current

• 1st Way to Calculate Collector Current Ic. Using Known Values. If the base current, Ib, and β are known, then Ic can be computed by the following formula: Example If Ib=35μa and β=100, then Ic calculates out to be: 2nd Way to Calculate Collector Current Ic. Using Known Values

• ## How do I calculate the base and collector current in this

The transistor is in saturation, so that its V C E is about 0.2V. Assuming the LED is white, its V F is about 3V. From these, you can calculate the base current I B = 9 V − 0.6 V 220 k Ω and collector current I C = 9 V − 0.2 V − 3 V 330 Ω, and then find β = I C I B. If you find a transistor whose datasheet β F is larger than this value, then the circuit will work as advertised (once the transistor goes into saturation, its β will drop to the calculated value).

• collector_current = Current Amplification factor * Emitter current I c = α * I e This formula uses 2 Variables Variables Used Current Amplification factor – Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current.

• The collector current for BJT is given by: I­C = βFIB + ICEO ≈ βFIB I­C = α IE IC = IE – IB

• COMMON EMITTER CONNECTION | Collector current formulaIn this connection emitter terminal is common to both input and output signal.This connection is also c

• 4th Way to Calculate Emitter Current I e. Using Known Values If Ib and Ic are known, Ie can be calculated using the formula: Example If Ic=3.95mA and Ib=50µA, then Ie calculates out to be: Related Resources. How to Calculate the Base Current IB of a BJT Transistor How to Calculate the Collector Current IC of a BJT Transistor

• • ## Common Collector Amplifier – Basic Electronics Tutorials

Since the common collector current gain is defined as the ratio of the emitter current to the base current, γ = I E /I B = β + 1, it therefore follows that the amplifiers current gain must be approximately equal to Beta (β) as β + 1 is virtually the same as Beta.

• Jan 28, 2021 · You are looking for a formula? The other way round: A pretty large base current is an indication for forward operation of the base-collector junction. It is common practice to say (for example) that a base current which is app. 1/10 of the collector current is a good and safe indication for a forward biased B_C junction.

• current IE. Furthermore the number of electrons injected into the collector region is directly related to the electrons injected into the base region from the emitter region. Therefore, the collector current is related to the emitter current which is in turn a function of the B-E voltage.

• Short-circuit collector current at a unity-gain frequency calculator uses collector_current = ( Transconductance – Complex frequency variable * Collector-base junction capacitance )* Finite input voltage to calculate the Collector current, The Short-circuit collector current at a unity-gain frequency formula, in this circuit the collector is

• If the collector current, Ic, and the emitter current, Ie, are known, then α can be calculated by the following formula: Example If the collector current Ic= 7.95ma and the emitter current Ie=8ma, then alpha calculates out to be: Related Resources. How to Calculate β of a BJT Transistor How to Calculate VBB of a BJT Transistor

• ## Transistor Configuration – Common Base, Collector and Emitter

Alpha is the relationship of collector current (output current) to emitter current (input current). Alpha is calculated using the formula: α=(∆Ic )/∆IE

• The effective AC series resistance of the emitter is about 25/ICohms. The base-emitter voltage VBEis temperature dependent, decreasing about 2.1 mV/C. The base-emitter voltage VBEvaries slightly with the collector-emitter voltage VCEat constant collector current IC: ΔVBE≈ -0.001ΔVCE. Base-emitter Voltage Curve. Index.

• Since the common collector current gain is defined as the ratio of the emitter current to the base current, γ = I E /I B = β + 1, it therefore follows that the amplifiers current gain must be approximately equal to Beta (β) as β + 1 is virtually the same as Beta.

• The transistor continuously monitors V diff and adjusts its emitter voltage almost equal (less V BEO) to the input voltage by passing the according collector current through the emitter resistor R E. As a result, the output voltage follows the input voltage variations from V BEO up to V + ; hence the name, emitter follower .

• If the emitter current, Ie, and the collector current, Ic, are known, IB can be calculated by the formula: Example If Ie=4ma and Ic=3.96ma, then IB calculates out to be: Related Resources. How to Calculate the Collector Current IC of a BJT Transistor How to Calculate the Emitter Current IF of a BJT Transistor How to Calculate β of a BJT Transistor

• ## Transistors: Bipolar Junction Transistors (BJT)

This is the saturation current and when the transistor operates at this point it is said to be biased in the saturation mode. In saturation, the base-collector junction is forward biased and the relationship between the base and the collector current is not linear. Therefore the collector current at saturation is () ()CC CE C C VVsat Isat R − = (1.9)

• The formula is below: I C = h FE I B =βI B So if 1mA is fed into the base of a transistor and it has a h FE of 100, the collector current will be 100mA. Every transistor has its own unique h FE.

• Jan 23, 2015 · Already we know that the emitter current is the sum of base and collector currents. i.e. IE =IC+ IB. The current flowing through the resistive load (RL) is equal to the collector current of the transistor. The equation for the collector current is given by, I C = (V CC-V CE)/ R L

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