Electronics Manufacturing

The string of solar panels has been isolated, and the technician has completed the Lockout/Tagout (LOTO) procedure; he now stands before a combiner box, clamp meter in hand. A few hundred meters away, a bolt of lightning strikes an open patch of ground—missing the solar panels entirely. Yet, through the very conductor he is currently testing, a voltage surge of several thousand volts has just flashed by in less than a millisecond

In a solar power plant, the most dangerous moment is not when the system is operating at full capacity. Rather, it occurs just before a technician disconnects a connector, replaces a fuse, or opens an inverter cabinet even after the solar string has been isolated

Power integrity requires more than applying simple decoupling-capacitor rules of thumb. As IC processes reach gigahertz levels, lower-speed circuitry also needs more careful consideration.

Power electronics and power integrity aim to deliver suitable voltages, currents, and noise characteristics, yet differences in tools, vocabulary, and figures of merit can hinder alignment.

Clock jitter can interfere with digital circuits, including high-speed ADCs. High-speed clocks may be sensitive to power cleanliness, while quantifying that relationship takes careful effort.

A Rogowski coil produces a voltage related to the rate of change of enclosed current. Integration converts that signal to one proportional to current, but the method does not operate at DC.

Output impedance testing connects a J2111A current injector and probe to an LM117 output; small-signal load steps use an AWG and no injector bias current.

A 2-port shunt-through setup with the Bode 100 uses Gain/Phase mode, a 50 Ohm termination on Ch2, Thru calibration, and a logarithmic sweep to read impedance and estimate inductance.

PDN measurement commonly relies on a vector network analyzer. The source distinguishes 1-port measurement for higher impedance from 2-port shunt-through measurement for very low impedance, while noting that instrument cost can affect the approach.

An FRA is commonly used for transfer functions and power-supply control loops. A VNA provides port-based S-parameter, reflection, and calibrated impedance measurements for more complex RF and interconnect work.