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  Using Bipolar Preamplifiers in an LTC2411-Based Correlated Double Sampling Scheme Produces a Noise Floor of Under 100nVRMS &mdash LT Journal
  PDF, 160 Kb, 档案已发布: May 1, 2001
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  DESIGN IDEAS Using Bipolar Preamplifiers in an
  LTC2411-Based Correlated Double
  Sampling Scheme Produces a Noise
  by Derek Redmayne
  Floor of Under 100nVRMS
  Introduction
  AC excitation. Putting preamplification in front of 24-bit delta sigma
  converters such as the LTC2410 or
  LTC2411 now uncovers the limitations of precision op amps. The most
  serious of these limitations are offset
  voltage drift, 1/f noise and thermocouple voltages that, in the presence
  of turbulent airflow, produce noise.
  The use of correlated double sampling, a close cousin of AC excitation,
  circumvents most of the problems
  associated with the use of a low noise
  bipolar amplifier, but can often
  become complicated, or can easily be
  compromised to the extent that its
  use is not worthwhile. 1/f noise are virtually eliminated.
  Correlated double sampling has been
  used in high end weigh scale applications for many years.
  A low noise bipolar amplifier may
  seem like the obvious choice as a …

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• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > Precision Amplifiers (Vos | Low Power Amplifiers (Is < 1mA/amp) | High Voltage Amplifiers (>12V) | Rail-to-Rail Amplifiers

其他名称:

LT1219CN8PBF, LT1219CN8 PBF