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Richard M. Kurzrok

Richard M. Kurzrok is with RMK Consultants, Queens Village, N.Y. He has been part of the electronics industry since 1953. He received a BEE and an MBA from New York University and an MEE from Polytechnic Institute of Brooklyn (now Polytecnic University). He has written and published over 100 technical articles.


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Author Articles

  • L-C High-Pass Filter Reduces Power Supply's Hum And Ripple

    By Richard M. Kurzrok, March 01, 2007

    A previous Idea for Design described an R-C twin-tee circuit designed to reduce power-supply hum at 50 to 60 Hz ("R-C Twin-Tee Reduces Power-Supply Hum,"). This Idea for Design presents a new L-C high-pass filter that reduces both power-supply hum

  • R-C Twin-Tee Circuit Reduces Power-Supply Hum

    By Richard M. Kurzrok, May 11, 2006

    The R-C twin-tee passive circuit supplies band-reject (notch) filtering to portable applications. It has a circuit Q (loaded) of 0.25. Satisfactory rejection can be achieved when the bridge is balanced (close tolerances of adjustable components) and the

  • L-C Transformer Cuts Cost And Size, Adds Low-Pass Filtering

    By Richard M. Kurzrok, July 21, 2003

    L-C equivalents of microwave quarter-wave transformers provide cost savings, miniaturization, and supplementary low-pass filtering. Typically, these transformers have been synthesized directly with published design tables.1, 2 But the...

  • Passive RC Filters Afford Low Cost And High Selectivity

    By Richard M. Kurzrok, February 03, 2003

    Passive RC filters are easy to design and use at audio frequencies.

  • Wideband Filter Only Has Two Different Components

    By Richard M. Kurzrok, January 21, 2002

    Wideband filters with bandwidths in excess of an octave can be created by cascading a high-pass filter and a low-pass filter. In this design idea, nine-pole high-pass and low-pass filters have been constructed using a modified equal-element design. A...

  • Designing Extended-Range Toroidal Inductors

    By Richard M. Kurzrok, August 07, 2000

    Toroidal inductors are often used in passive filter and equalizer circuits in the 1- to 100-MHz range. For appreciable relative permeabilities and moderate circuit selectivities, stray magnetic fields are sparse1. Coils can be adjusted to...