The above circuit and thesis is reasonably OK. A couple of things not included in the above engineering are:
- loss of course in the line/circuitry leading to the above measuring circuitry, including to the two resistors.
- The thermo properties of the two resistors being heated by the signal-under-test and the DC signal. You have to, of course, also include the TRANSIENT thermo properties of both (I never did trust DC, including the wiring to/from the power supply.)
By the way, I believe your above circuit, including it basic premise, is covered by a patent taken out by Norm Dillman while at HP.
Myself, I used similar circuit approaches as this to provide thermal biasing stability on the many class B power amplifiers I designed for GE Audio Products back in the 60's.
But you have a nice circuit as well as a nice paper describing it and your engineering.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.