BEE Bachelor of Electrical Engineering Analog and Digital Electronics Questions and Answers Flashcards
6 cards from real BEE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 BEE Bachelor of Electrical Engineering Analog and Digital Electronics Questions and Answers flashcards as text
What is the quiescent power dissipation of an ideal Class B push-pull amplifier when no signal is applied?
Answer: Zero
In an ideal Class B amplifier, both transistors are biased at cutoff with no input signal, so no quiescent current flows and power dissipation is zero.
Which Boolean expression correctly represents the output of a 2-input XNOR gate?
Answer: A·B + A'·B'
An XNOR gate outputs high when both inputs are the same, which is expressed as AB + A'B'.
In a successive approximation ADC, how many clock cycles are required to complete a conversion for an n-bit result?
Answer: n cycles
A successive approximation ADC tests one bit per clock cycle starting from the MSB, requiring exactly n cycles for an n-bit conversion.
What is the dominant effect of Miller capacitance in a common-emitter amplifier?
Answer: It reduces the high-frequency bandwidth
Miller capacitance multiplies the base-collector capacitance by the voltage gain, creating a large effective input capacitance that limits high-frequency response.
What is the maximum number of states in a 3-bit Johnson counter?
Answer: 6
A Johnson counter (twisted ring counter) with n flip-flops cycles through 2n unique states, so a 3-bit version has 6 states.
Which parameter of an operational amplifier describes the change in output offset voltage caused by a change in supply voltage?
Answer: Power supply rejection ratio
Power supply rejection ratio (PSRR) measures how well an op-amp rejects variations in its power supply voltage from appearing at the output.