Preamplifier for Digital Voltmeter

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65c0e473-b6ce-4b4d-a9a2-e80d8a072cb6.zip

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Description

SPICE simulation of preamplifier for digital voltmeter. This microvolt preamplifier employs in the first stage a zero-drift op amp LTC2054 and a picoampere input current LTC6090 in the second stage. The amplifier voltage gain is 100 for input +/- 700mV with a bandwidth of 120khz or 1000 for input +/- 70mV with a bandwidth of 12khz. A jumper switches between the two configurations.

  • : Free
  • : Simple
  • : 31-50
  • : LTspice
  • : IV
  • : No

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