Preamplifier for Digital Voltmeter

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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
  • 500uV input 50mV output, Av=100


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