High Amplitude Sharp Pulse Generation Assignment

Assignment Task

Literature Review. Investigate fundamental pulse generator circuits based on

• Step-recovery effect (SRE) of a BJT and diodes.
• Their comparison is based on pulse width, pulse amplitude, circuit complexity, and cost.

And of course, why do we need ultra-short pulses? What are the applications?

• Design a CLOCK generator (a simple 555 oscillator) to trigger the SRE circuit. What are the trigger pulse specifications? Do you have to use a high-pass filter (HPF) before the SRE circuit? Why?
• Simulations, layout and PCB production, and measurements.
• Investigate SRE diode circuits. In this section one or more novel architectures should be investigated.
• Design of a pulse generating circuit based on SRE of an RF diode.
• Simulations, layout and PCB production, and measurements.
• Perform spectrum analysis of these pulses (using a MATLAB code AND/OR spectrum analyzer).

Investigate SRE BJT circuits. In this section one or more novel architectures should be investigated. For example, how do you increase pulse amplitude or vary pulse width electronically? Reducing pulse rise and fall times are also important.

• Design of a pulse-generating circuit based on SRE of a BJT.
• Simulations, layout and PCB production, and measurements.
• Based on the results of this section a conference and/or journal paper is expected.
• Perform spectrum analysis of these pulses (a MATLAB code is required).

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