EEE 403: Analogue Electronics III First Semester Examination

Analogue electronics paper set for the electrical and electronic engineering and biomedical engineering degrees alike. Works through the operational amplifier: its design and functionality by block diagram, a differential amplifier built from bipolar junction transistors, output voltage from an open-circuit gain of 100 with inputs of 3.25 and 3.15 volts, bandwidth and maximum closed-loop gain from a 15 megahertz gain-bandwidth product, and the maximum operating frequency of an amplifier limited to 0.5 volts per microsecond slew rate at 8 volts peak output. Calculates the output of an inverting stage and of a summing amplifier, and asks for circuits that average three distinct voltages, take the difference of two, integrate a signal and differentiate one. Treats common-mode rejection ratio in decibels, the input impedance and differential gain of a transistor pair, Class B and Class C amplifier designs and the characteristics that make each unusual, input and output impedance and closed-loop gain of an amplifier stage, the instrumentation amplifier, generating a square wave from a sine input, the output of an integrator driven by a square wave, and comparing a signal amplitude against a fixed direct-current reference. Closes on a differential amplifier with a 500 microvolt single-ended signal and 1 volt of 50 hertz interference appearing on both inputs through radiated pick-up, and on bandwidth from a 100 decibel open-loop gain with a 3 megahertz unity-gain bandwidth.