Inverting summer circuit




This design sums (adds) and inverts two input signals, Vi1 and Vi2. The input signals typically come from lowimpedance sources because the input impedance of this circuit is determined by the input resistors, R1 and R2. The common-mode voltage of an inverting amplifier is equal to the voltage connected to the non-inverting node, which is ground in this design.
  • Input 1: ±2.5 V
  • Input 2: ±250 mV
  • Output: ± 4.9 V
  • Frequency: 10 kHz
  • Supply: ±5 V

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Design tool

Simulation for Inverting Summer Circuit SBOC494.ZIP (29KB)

Supported products & hardware

Supported products & hardware

General-purpose op amps
LMC7101 Single, 15.5-V, 1.1-MHz operational amplifier OPA170 Single, 36-V, 1.2-MHz, low-power operational amplifier

Technical documentation

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Type Title Date
* Circuit design Inverting Summer Circuit (Rev. C) PDF | HTML Feb. 01, 2021
Application note AN-31 Amplifier Circuit Collection (Rev. D) Oct. 21, 2020
Application note Handbook of Operational Amplifier Applications (Rev. B) Sep. 19, 2016

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