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Экологический статус

Application Notes

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  Practical Circuitry for Measurement and Control Problems &mdash AN61
  PDF, 1.1 Мб, Файл опубликован: 1 авг 1994
  This collection of circuits was worked out between June 1991 and July of 1994. Most were designed at customer request or are derivatives of such efforts. Types of circuits include power converters, transducer signal conditioners, amplifiers and signal generators. Specific circuits include low noise amplifiers, high power single cell DC/DC converters, portable high accuracy barometers, a 10mHz 1% accuracy RMS/DC converter, and random noise generators. Appended sections cover noise theory and present a historical perspective of wideband amplifiers.
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  Application Note 61
  August 1994
  Practical Circuitry for Measurement and Control Problems
  Circuits Designed for a Cruel and Unyielding World
  Jim Williams
  INTRODUCTION currents associated with the continuous operation of fixed
  frequency designs. Gated oscillator regulators simply
  self-clock at whatever frequency is required to maintain
  the output voltage. Typically, loop oscillation frequency
  ranges from a few hertz into the kilohertz region, depending upon the load. This collection of circuits was worked out between June
  1991 and July of 1994. Most were designed at customer
  request or are derivatives of such efforts. All represent
  substantial effort and, as such, are disseminated here
  for wider study and (hopefully) use.1 The examples are
  roughly arranged in categories including power conversion, transducer signal conditioning, amplifiers and signal
  generators. As always, reader comment and questions
  concerning variants of the circuits shown may be addressed
  directly to the author. In most cases this asynchronous, variable frequency operation does not create problems. Some systems, however, are
  sensitive to this characteristic. Figure 1 slightly modifies
  a gated oscillator type switching regulator by synchronizing its loop oscillation frequency to the systems clock. In
  this fashion the oscillation frequency and its attendant
  switching noise, albeit variable, become coherent with
  system operation. Clock Synchronized Switching Regulator …

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• Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Single Channel ADCs