BJT Basics
This is the number of PN junctions in a BJT.
What is two?
This is BetaDC if IB = 10uA and a IC = 5mA
What is 500?
The mode of operation when VCE = 0V.
What is saturation?
This is the formula for Av if given Vin and Vout
What is Vout/Vin?
What is IB?
This is the ratio of IC over IB.
What is Beta DC
This is IC if IB = 25uA and BetaDC = 350
What is 8.75mA?
The mode of operation when VCE = VCC.
What is cutoff?
This is the mode of operation a transistor must be in to operate as an amplifier.
What is the linear/active region?
This will be the approximate base current when a transitor is in cutoff.
What is 0A?
This value is equal to IE - IB.
What is IC?
This is IB if BetaDC = 450 and IC = 36mA
What is 80uA?
The mode of operation when VCE is greater than 0V but less than VCC.
What is the linear/active region?
This is the formula for Av (voltage gain) if give r'e (internal emitter resistance) and RC.
What is RC/r'e?
A DMM (digital multimeter) will read this on a properly functioning silicon NPN BJT when using diode test mode between the base and the emitter.
What is 0.7V?
This value is equivalent to BetaDC/(BetaDC+1).
What is AlphaDC?
DAILY DOUBLE!
This is the voltage gain (Av) of a transistor amplifier with Vin of 200mV and vout of 15V.
This value must be greater than or equal to IC(Sat)/BetaDC for the transistor to be in saturation.
What is IB?
This h-parameter is equivalent to BetaDC.
What is hFE?
This is the majority carrier in the base of a PNP transistor.
What are Electrons?
This is what the Base voltage must be, with respect to the emitter, for normal operation of a BJT.
What is Positive?
This is the output voltage of a transistor with an input voltage of 150mV and an Av of 45.
What is 6.75V?
This is the formula to calculate IC(sat).
What is (VCC - VCE)/(RE) or VCC/RE? (If we assume VCE is equal to zero at saturation.)
What is 8V?
This is section of a BJT is thin and lightly doped.
What is the base?