ELEC2104/9704 : Electronic Devices and Circuits - Engineering Assignment Help

Assignment Task:

Task:

Question 1 

the effective base width increases and the common-emitter current gain increases
the effective base width decreases and the common-emitter current gain decreases
the effective base width decreases and the common-emitter current gain increases
the effective base width increases and the common-emitter current gain decreases
An npn bipolar junction transistor (BJT) is operating in the forward active region. What will happen if the reverse bias voltage across the base-collector junction is increased?

Question 2 

In the circuit shown below the current through R is 0.7 mA. If I = 8.0 X 10 A, and the circuit is operating at room temperature, what is the value of R ? (Use a thermal voltage of 26 mV and choose the nearest answer)

Question 3 5 pts

For the circuit shown below, if β = 80, V = ∞, and V = 26 mV, what value of saturation current, I yields a collector current of 1 mA ? Choose the nearest value.

Question 4 5 pts

Consider the circuit shown below. Calculate the values of resistors R and R so that the transistor drain current is 1.5 mA assuming that the current flowing through resistor R is one-tenth of the drain current. Assume that , and threshold voltage is 0.7 V. What is the resistor value for the smaller of the two resistors R and R ? Choose the nearest value. Assume the bulk is connected to ground and the ratio between the channel width, W to channel length, L is shown in the diagram.

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