Summary:
A compilation of Op Amp configurations and transfer functions.
Articles Tagged ‘operational amplifier’
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Useful Operational Amplifier Formulas and Configurations
Sunday, August 23rd, 2009 » 4 CommentsTags: amplifier, Differential Amplifier, non-inverting, op amp (opamp) formulas, operational amplifier, Summing Amplifier, transfer function, voltage follower
Categories: Analog Design, Operational Amplifier Formulas
How to Derive the Transfer Function of the Inverting Summing Amplifier
Monday, August 17th, 2009Summary:
The inverting summing amplifier does exactly what its name says: adds the input signals and inverts the result. This amplifier presents a major advantage versus the non-inverting summing amplifier. The input signals are added with their own gain. The disadvantage is the inversion of the sum, which might not be desirable in some cases. How can we derive this function? What is the transfer function of the inverting summing amplifier with 3, 4, or n inputs? This article answers all these questions.
Tags: inverting summing amplifier, operational amplifier, proof, Summing Amplifier
Categories: Analog Design, Operational Amplifier Formulas, Summing Amplifier, Superposition Theorem
The Transfer Function of the Non-Inverting Summing Amplifier with “N” Input Signals
Sunday, August 9th, 2009Summary:
In a previous article, How to Derive the Summing Amplifier Transfer Function, I deduced the formula for the non-inverting summing amplifier with two signals in its input. But what if we have 3, 4 or an n number of signals? Can we add them all with one amplifier?
Tags: amplifier, analog, non-inverting, op amp (opamp) formulas, operational amplifier, proof, Summing Amplifier, summing amplifier formula, transfer function
Categories: Analog Design, Operational Amplifier Formulas, Summing Amplifier, Superposition Theorem
How to Derive the Summing Amplifier Transfer Function
Thursday, July 9th, 2009Summary:
The summing amplifier, or the non-inverting summing amplifier, is an analog processing circuit with the transfer function (the summing amplifier formula as some say) shown in the following equation.
(1)
The first term of the product is the actual summing, while the second term is a gain due to the R3 and R4 resistors. I prefer this [...]
Tags: amplifier, analog, non-inverting, op amp, operational amplifier, proof, Summing Amplifier, summing amplifier formula, transfer function
Categories: Analog Design, Operational Amplifier Formulas, Summing Amplifier, Superposition Theorem
Converting a Differential Amplifier into a Summing Amplifier
Thursday, June 25th, 2009Summary:
Is there any link between a differential amplifier and a summing amplifier? Yes, it is. They can be easily converted one into the other one. While this article shows the conversion, the main purpose is to demonstrate how the same circuit can be viewed as a differential amplifier or as a summing amplifier, depending on the voltage levels in its inputs.
Tags: Differential Amplifier, op amp, operational amplifier, Summing Amplifier
Categories: Analog Design, Differential Amplifier, Summing Amplifier, Superposition Theorem
Thursday, June 18th, 2009
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Tags: non-inverting, operational amplifier, Summing Amplifier, summing amplifier examples, summing amplifier formula
Categories: Analog Design, Summing Amplifier
Summary:
This article describes how to design a summing amplifier based on the input and output requirements.
Tags: non-inverting, operational amplifier, Summing Amplifier, summing amplifier examples, summing amplifier formula
Categories: Analog Design, Summing Amplifier
The Differential Amplifier Common-Mode Error – Part 2
Sunday, June 7th, 2009Summary:
When designing a differential amplifier, part of the art is to manage the errors affecting the precision of the circuit. In The Differential Amplifier Common-Mode Error – Part 1 of this presentation I discussed the common-mode error of a differential amplifier. I also showed that, given the circuit in Figure 1, the common-mode voltage can be viewed as V2, when we consider V1-V2 as a signal that rides on top of V2. The same goes for V1, which can be considered the common-mode voltage of the differential amplifier when -(V1-V2) is the signal that rides on top of V1.
Tags: amplifier, common-mode, Differential Amplifier, operational amplifier
Categories: Analog Design, Differential Amplifier, Power Supply
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