Base Resistance Solution

STEP 0: Pre-Calculation Summary
Formula Used
Base Resistance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Collector Base Capacitance)
Rb = fco/(8*pi*fm^2*Cc)
This formula uses 1 Constants, 4 Variables
Constants Used
pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288
Variables Used
Base Resistance - (Measured in Ohm) - Base resistance is the resistance of the base junction.
Cut-off Frequency in BJT - (Measured in Hertz) - Cut-off frequency in BJT is defined as corner frequency is a boundary in system's frequency response at which energy flowing through system begins to be reduced rather than passing through.
Maximum Frequency of Oscillations - (Measured in Hertz) - Maximum frequency of oscillations is defined as the practical upper bound for useful circuit operation with BJT.
Collector Base Capacitance - (Measured in Farad) - Collector Base Capacitance refers to the capacitance that exists between the collector and the base of a bipolar junction transistor (BJT).
STEP 1: Convert Input(s) to Base Unit
Cut-off Frequency in BJT: 30 Hertz --> 30 Hertz No Conversion Required
Maximum Frequency of Oscillations: 69 Hertz --> 69 Hertz No Conversion Required
Collector Base Capacitance: 255 Microfarad --> 0.000255 Farad (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Rb = fco/(8*pi*fm^2*Cc) --> 30/(8*pi*69^2*0.000255)
Evaluating ... ...
Rb = 0.983202633479715
STEP 3: Convert Result to Output's Unit
0.983202633479715 Ohm --> No Conversion Required
FINAL ANSWER
0.983202633479715 0.983203 Ohm <-- Base Resistance
(Calculation completed in 00.020 seconds)

Credits

Created by Shobhit Dimri
Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat
Shobhit Dimri has created this Calculator and 900+ more calculators!
Verified by Urvi Rathod
Vishwakarma Government Engineering College (VGEC), Ahmedabad
Urvi Rathod has verified this Calculator and 1900+ more calculators!

15 BJT Microwave Devices Calculators

Maximum Frequency of Oscillations
Go Maximum Frequency of Oscillations = sqrt(Common Emitter Short Circuit Gain Frequency/(8*pi*Base Resistance*Collector Base Capacitance))
Emitter Base Charging Time
Go Emitter Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Base Transit Time)
Base Collector Delay Time
Go Base Collector Delay Time = Emitter Collector Delay Time-(Collector Charging Time+Base Transit Time+Emitter Charging Time)
Collector Charging Time
Go Collector Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Base Transit Time+Emitter Charging Time)
Base Transit Time
Go Base Transit Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Emitter Charging Time)
Emitter to Collector Delay Time
Go Emitter Collector Delay Time = Base Collector Delay Time+Collector Charging Time+Base Transit Time+Emitter Charging Time
Collector Base Capacitance
Go Collector Base Capacitance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Base Resistance)
Base Resistance
Go Base Resistance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Collector Base Capacitance)
Avalanche Multiplication Factor
Go Avalanche Multiplication Factor = 1/(1-(Applied Voltage/Avalanche Breakdown Voltage)^Doping Numerical Factor)
Saturation Drift Velocity
Go Saturated Drift Velocity in BJT = Emitter to Collector Distance/Average Time to Traverse Emitter to Collector
Emitter to Collector Distance
Go Emitter to Collector Distance = Maximum Applied Voltage in BJT/Maximum Electric Field in BJT
Total Charging Time
Go Total Charging Time = Emitter Charging Time+Collector Charging Time
Cut-off Frequency of Microwave
Go Cut-off Frequency in BJT = 1/(2*pi*Emitter Collector Delay Time)
Total Transit Time
Go Total Transit Time = Base Transit Time+Collector Depletion Region
Hole Current of Emitter
Go Hole Current of Emitter = Base Current+Collector Current

Base Resistance Formula

Base Resistance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Collector Base Capacitance)
Rb = fco/(8*pi*fm^2*Cc)

What is Frequency of Oscillation Wave?

Frequency of oscillation (f) (or just frequency): the number of times the wave pattern repeats itself in one second

How to Calculate Base Resistance?

Base Resistance calculator uses Base Resistance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Collector Base Capacitance) to calculate the Base Resistance, The Base Resistance formula is defined as a base resistor that controls the amount of current entering the base junction of a bipolar junction transistor (BJT) to cause it to conduct in the saturation region. Base Resistance is denoted by Rb symbol.

How to calculate Base Resistance using this online calculator? To use this online calculator for Base Resistance, enter Cut-off Frequency in BJT (fco), Maximum Frequency of Oscillations (fm) & Collector Base Capacitance (Cc) and hit the calculate button. Here is how the Base Resistance calculation can be explained with given input values -> 0.983203 = 30/(8*pi*69^2*0.000255) .

FAQ

What is Base Resistance?
The Base Resistance formula is defined as a base resistor that controls the amount of current entering the base junction of a bipolar junction transistor (BJT) to cause it to conduct in the saturation region and is represented as Rb = fco/(8*pi*fm^2*Cc) or Base Resistance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Collector Base Capacitance). Cut-off frequency in BJT is defined as corner frequency is a boundary in system's frequency response at which energy flowing through system begins to be reduced rather than passing through, Maximum frequency of oscillations is defined as the practical upper bound for useful circuit operation with BJT & Collector Base Capacitance refers to the capacitance that exists between the collector and the base of a bipolar junction transistor (BJT).
How to calculate Base Resistance?
The Base Resistance formula is defined as a base resistor that controls the amount of current entering the base junction of a bipolar junction transistor (BJT) to cause it to conduct in the saturation region is calculated using Base Resistance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Collector Base Capacitance). To calculate Base Resistance, you need Cut-off Frequency in BJT (fco), Maximum Frequency of Oscillations (fm) & Collector Base Capacitance (Cc). With our tool, you need to enter the respective value for Cut-off Frequency in BJT, Maximum Frequency of Oscillations & Collector Base Capacitance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
Let Others Know
Facebook
Twitter
Reddit
LinkedIn
Email
WhatsApp
Copied!