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Samuel Kerem

Samuel Kerem holds a master's degree in biomedical electronics from Saint Petersburg Electrotechnical University, Russia.


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Author Articles

  • Tame Switching Supply Noise While Maintaining Efficiency

    By Samuel Kerem, December 11, 2008

    A number of situations could benefit from the high efficiency of a switched power supply, save for the supply’s intrinsically high noise level. For example, an optical communications application using a large number of laser diodes could

  • Switched-Capacitor-Based Bandpass Filter Boasts (Nearly) Rectangular Shape

    By Samuel Kerem, September 25, 2008

    The filter described below is useful for detecting a signal that’s closely surrounded by spurs, even when the task is complicated by the frequency of the signal of interest wandering by a few percent. For example, in telecom, a pilot signal ca

  • Add On-Board Power Measurement Capability To Telecom Equipment

    By Samuel Kerem, July 24, 2008

    This idea shows how to monitor input voltage and current consumption for telecommunications equipment powered by two independent feeds: -48 V (A) and -48 V (B). Each feed supplies at least -42.5 V to -56.5 V, and for redundancy the feeds are O

  • Simple Circuit Protects Hot-Swap And Boost Controllers

    By Samuel Kerem, June 10, 2002

    The conventional boost-converter topology has the potential trap of no short-circuit protection (Fig. 1). Typically, a converter is safeguarded by placing an electronic fuse in front of it. This fuse...

  • Comparator Features Symmetrical Thresholds

    By Samuel Kerem, March 06, 2000

    The comparator often is the simplest bridge between analog and digital worlds, but crossing this bridge isn't as simple as might be thought. Keep in mind, we are leaving the analog world with an indefinite number of states and entering into a vastly...