Pete Semig is an analog-electronics engineer and technical author associated with Texas Instruments. A2013 company reference design identifies his applications work on difference and instrumentation amplifiers. The same document credits Peter Semig on its title page and uses Pete Semig in its author biography.[ref]
10 µA-10 mA, Single-Supply, Low-Side, Current Sensing Solution by Pete Semig. title page and About the Author, printedp13
His current-measurement work connects a small electrical signal to an instrument's usable range. A shunt resistor produces an electric potential difference proportional to current, and an amplifier makes that difference easier to measure. The2013 reference describes a single-supply low-side current sensing design for a stated10microampere-to10milliampere range.[ref]
10 µA-10 mA, Single-Supply, Low-Side, Current Sensing Solution by Pete Semig. Circuit Description and Theory of Operation
For an original simplified example, choose a1ohm shunt and current . The shunt drop is , and a voltage gain of50 gives a1volt output. The shunt also dissipatesThus the measurement element changes the circuit it measures, through both its voltage drop and its dissipation. An input-equivalent amplifier offset of100microvolts would correspond to0.1milliampere in this example. These selected values do not reproduce the reference design.
Semig's Integrator Circuit by Pete Semig similarly states the operating limits behind an integrating amplifier: capacitor feedback gives an ideal integral, while offsets, finite bandwidth and the DC feedback path limit practical behavior.[ref] His technical contribution is to connect circuit equations with component choices and the conditions under which a measurement remains interpretable.
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