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Very short answer questions: The IR Detector that we tested in the lab was essentially a...

Very short answer questions:


The IR Detector that we tested in the lab was essentially a photo diode. What quantity was the light (from the infra-red source) converted into. Is this the same as a pn-junction diode? Sketch the I-V characteristics of the photodiode.


Derive the gain expression for a non-inverting amplifier setup and for an inverting amplifier setup.


Both 741 and 311 can be used as a comparator. Which one is better? Justify by explaining their output voltage waveforms.


What are the VBE (voltage from base to emitter) and VBC (voltage from base to collector) voltages when 2N3904 transistor (npn) is not connected to any supply? Draw the direction of the two diode junctions so formed.


What are the voltage and current gains for a Emitter Follower and Common Emitter Amplifier?

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