Daniel Dufresne

Daniel Dufresne is a retired engineer and has worked in telecommunications, mass transit, consumer products, high power electronics and custom instrumentation design. He also was a professor at Cegep de Saint-Laurent and taught courses at Ecole Polytechnique de Montreal. He lives in Montreal, Canada and still works on electronic projects and test equipment modifications and repairs.

Areas of interest of the author: Supply

Publications on RadioLocman by the author Daniel Dufresne:

The start-up transistor works once!
It’s the mid 1990’s and I am a design engineer for a company that designs and manufactures custom measurement systems and high power electronics. Our customers range from experimental fusion reactor operators to electric utilities. One day my boss tells me to join...
23-02-2023
Active shunt voltage limiter outshines Zener
I need a circuit to limit the voltage across some dissipation limited devices. It must: limit the voltage to a maximum of 1.5 V, have symmetrical limiting, be capable of accepting a current of 2 A, and leak less than 100 µA at 1 V. Two Zener diodes...
1. Active shunt voltage limiter outshines Zener. Part 1
  16-01-2023
2. Active shunt voltage limiter outshines Zener. Part 2
  17-01-2023