This article discusses CMOS inverter switching and shows the impact of a decoupling capacitor on the power rail signal integrity and radiated emissions.
When measuring signals in electronic circuits some times what you see on the screen is not what you have in the circuit. Parasitic couplings, mismatching, noise pickup, and many other anomalous effects can give you the wrong picture of your problem.
Whenever an electronic circuit is first energized, transients occur in current and voltage waveforms. These start-up transients can affect the electrical and thermal behavior of components and circuits with serious reliability, EMI, and random effects. Try to characterize how your circuits start and stop.
A Product Safety Newsletter reader asked about where limited-current circuits are required by IEC 950, Sub-clause 2.4.1. He noted that a 5-volt DC circuit will give 2.5 milliamperes into the 2 kohm test resisto... Read More...
A Japanese research facility was awarded a U.S. patent for a new method for detecting counterfeit goods by testing and analyzing circuits. The patent points out that before the 1990s, circuits were only built b... Read More...
A team of scientists at the Ecole Polytechnique Federale de Lausanne have developed photonic transistor used in optical circuits that require an extremely low amount of energy to operate. The small device acts ... Read More...