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Author Articles

  • Add Programmable Gain To A Peak Detector

    By Chuck Wojslaw, October 14, 2002

    If your system's signal processing requirements in-clude peak detection and amplification, consider a simple circuit that will satisfy both needs and save hardware. The single-supply circuit shown in the ...

  • Programmable Schmitt Triggers Are Digitally Controlled

    By Chuck Wojslaw, March 18, 2002

    The circuit in Figure 1 is a single-supply version of a programmable Schmitt trigger, or a comparator with hysteresis. A comparator, A1, and a digitally programmable potentiometer (DPP1) are used for the...

  • Taking The Stops Out Of Digital Potentiometers

    By Chuck Wojslaw, October 01, 2001

    A three-wire bus is commonly used to control digitally controlled potentiometers (DCPs). One example of this type of bus is Xicor's 32-tap X9315 (U3), shown in the figure. This asynchronous bus has no...

  • Photovoltaic Transimpedance Amp Is Programmed By Digital Pots

    By Chuck Wojslaw, June 26, 2000

    Millions of photovoltaic detectors are used to sense and measure radiant energy in every type of industrial, medical, consumer, and scientific instrumentation application. By properly selecting materials and structure, solid-state photovoltaics can...

  • Precision Thermometer Linearizes, Digitally Calibrates Platinum RTDs

    By Chuck Wojslaw, May 29, 2000

    Among temperature transducers, the platinum resistance temperature detector (PRTD) is generally accepted as the “gold standard.” PRTDs are available with interchangeability accuracies as tight as 0.1°C over operational ranges extending from...

  • Programmable Pressure Transducer

    By Chuck Wojslaw, May 15, 2000

    The micromachined monolithic silicon piezoresistive-bridge pressure transducer (SPPT) is a dominant technology in automotive, industrial, medical, and environmental pressuresensing applications. Available from many vendors in many variations, all...