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Экологический статус

Design Notes

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  24-Bit ADC Measures from DC to Daylight &mdash DN219
  PDF, 76 Кб, Файл опубликован: 1 дек 1999
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  24-Bit ADC Measures from DC to Daylight – Design Note 219
  Derek Redmayne
  The need to measure a wide variety of physical phenomena is increasingly important in intelligent sensors. The
  following circuit gives eight examples of the flexibility of
  the LTC В®2408 for sensing real world phenomena. The
  eight inputs of the LTC2408 are used here in a variety
  of ways that would not be practical without the dynamic
  range of the LTC2408.
  GUARD RING 5V ELECTROMETER
  INPUT
  (pH, PIEZO) 3 7 + 2 R5
  5k, 1% 6 LT1793 All of the examples shown use single-ended sensing
  and an absolute minimum of external circuitry. Inputs
  to the circuit shown range from high voltage DC to
  ultraviolet light. Output data represents amplitude or
  power levels for signals in all the AC inputs.
  L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks
  of Linear Technology Corporation. All other trademarks are the property of their
  respective owners.
  DC
  VOLTMETER
  INPUT
  1mV TO 1000V R1 …

Статьи

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  Four New Amplifiers Serve Many Applications &mdash LT Journal
  PDF, 100 Кб, Файл опубликован: 1 сен 1999
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  LINEAR TECHNOLOGY
  SEPTEMBER 1999 IN THIS ISSUE…
  Four New Amplifiers
  Serve Many Applications . 1
  Issue Highlights . 2
  LTC® in the News… . 2
  DESIGN FEATURES
  JFET Op Amps Equal Low Noise
  Bipolars and Have Picoamp
  Current Noise . 3
  Alexander Strong LTВ®1813: 100MHz, 750V/Вµ s Amplifier
  Draws Only 3mA . 5
  George Feliz Micropower, Precision Current Sense
  Amplifier Operates from 2.5V to 60V
  . 7
  Richard Markell, Glen Brisebois and
  Jim Mahoney Triple 300MHz Current Feedback
  Amplifiers Drive RGB/Component
  Video and LCD Displays . 12
  Brian Hamilton LTC1702/LTC1703 Switching
  Regulator Controllers Set a New
  Standard for Transient Response
  . 16 …

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  JFET Op Amps Equal Low Noise Bipolars and Have Picoamp Current Noise &mdash LT Journal
  PDF, 160 Кб, Файл опубликован: 1 сен 1999
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  DESIGN FEATURES JFET Op Amps Equal Low Noise
  Bipolars and Have Picoamp
  by Alexander Strong
  Current Noise
  The LT1792 and LT1793 are single
  JFET op amps that offer both very low
  voltage noise (4nV/в€љHz for the LT1792
  and 6nV/в€љHz for the LT1793) and low
  current noise (10fA/в€љHz for the
  LT1792 and 0.8fA/в€љHz for the
  LT1793), providing the lowest total
  noise over a wide range of transducer
  impedance. Traditionally, op amp
  users have been faced with a choice:
  which op amp will have the lowest
  noise for the transducer at hand. For
  high transducer impedance, the
  LT1792/LT1793 JFET op amps will
  win over the lowest voltage noise
  bipolar op amps due to lower current
  noise. The current noise (2qIB) of an
  amplifier is a function of the input
  bias current (IB). For lower transducer impedance, bipolar op amps …

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Классификация производителя

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > Low Noise Amplifiers ( | JFET Input Amplifiers | High Voltage Amplifiers (>12V)