Short Project-4 (100 Points) EEEN 3325–Fall 2020
(Individual teams, all closed materials.)
Given: November 13, 2020.
Due: (No later than) November 20, 2020.
Name-1, K-number: ______________________________, ____________ Grade: ______
Name-2, K-number: ______________________________, ____________
1) Design a fixed-bias circuitry by explicitly calculating each component and variable values.
Then, analyze the saturation and load-line conditions for variations in the input voltage, input
current, emitter current, collector resistor, and AC output voltage variations. Also, obtain the
voltage gain by using the re equivalent model.
2) Design a emitter-stabilized bias circuitry by explicitly calculating each component and
variable values. Then, analyze the saturation and load-line conditions for variations in the
transistor beta and AC input voltage variations. Explain the stability of the circuit variables with
respect to the transistor parameter variations. How can the designed circuit be improved for low
power microcontroller interface operations?
3) Design a DC bias with voltage feedback circuitry by explicitly calculating each component
and variable values. Then, analyze the load-line conditions for variations in the transistor beta
and coupling capacitor variations. How can the designed circuit be improved for autonomous
vehicle operations?
4) Design a BJT circuit, at least including, two positive output and two negative output power
supplies, and fewer than six resistors, to obtain the largest AC output swing without distortion (If
needed, plausible assumptions can be made with full justification).
5) Design a BJT circuit, at least including, one positive output and one negative output power
supplies, Thevenin voltage and resistor implementations, and more than five resistors, to obtain
the lowest power consumption by the transistor while DC output level of 12V (If needed,
plausible assumptions can be made with full justification).
6) Obtain one common-Emitter, common-Collector, and common-Base BJT re equivalent
circuits, whose current gains are higher than 2. (If needed, plausible justification is expected for
potentially conflicting conditions).