Preamplifier for Digital Voltmeter

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.

• Project Type: Free
• Complexity: Simple
• Components number: 31-50
• SPICE software: LTspice
• Software version: IV
• Full software version nedeed : No
• Screenshots simulation images: