Converting a Differential Amplifier into a Summing Amplifier
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...
View ArticleUseful Operational Amplifier Formulas and Configurations
A compilation of Op Amp configurations and transfer functions.
View ArticleDifferential Output Circuit
What is this circuit good for? It creates a single-ended-input-differential-output amplifier, in which VCM is the common mode and the main signal, in this case the average (VA+VB)/2 rides on top of...
View ArticleDesign a Unipolar to Bipolar Converter for a Unipolar Voltage Output DAC
Unipolar to bipolar converters are useful when we have to have a unipolar component to do a certain job in a mixed signal design environment. For example, Digital to Analog Converters (DACs) may have...
View ArticleDesign a Differential Amplifier the Easy Way with Mathcad
For those of you who have Mathcad, designing a differential amplifier is really easy. Let’s say you need to design a unipolar to bipolar converter and you decide to use a differential amplifier for...
View ArticleDifferential Amplifier Calculator
If you need to design a differential amplifier, here is a handy calculator. All you need to define are the input range, the output range and a choice of a voltage reference. The default values for this...
View ArticleHow to Design a Circuit from its Transfer Function Graph
Sometimes all we know about a circuit is its transfer function graph. The transfer function might look like the one in Figure 1. How can we design a circuit so that its input-output behavior will match...
View ArticleDifferential Amplifier Output Common-Mode Voltage Calculator
A differential amplifier frequent use is the amplification of the voltage difference between its input signals, while rejecting the common-mode level. However, the output common-mode level cannot be...
View ArticleA Summing and Differential Amplifier with One Op Amp
In a comment, one of my readers asked me what is the transfer function of the non-inverting summing amplifier in Figure 1, when R3 is connected to a reference voltage instead of ground. Well, this is a...
View ArticleDesign a Unipolar to Bipolar Converter the Easy Way with Microsoft Mathematics
Many analog circuits can be calculated with simple algebra. This may involve an equation or a system of equations, but the calculations are quite simple. Take the differential amplifier, as an example....
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