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These amplifiers have several distinct advantages over standard operational amplifier types in single supply applications. The LM358 series is equivalent to one−half of an LM324. Of that kind, amplifiers are used in a variety of electronic circuits.Utilizing the circuit designs perfected for Quad Operational Amplifiers, these dual operational amplifiers feature low power drain, a common mode input voltage range extending to ground/VEE, and single supply or split supply operation. The voltage adder circuit is simple to recognize and allows multiple signals to link together.
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The term summing amplifier is used to add two signal voltages. Here you can see the practical implementation of the LM358 Opamp adder circuit including two separate batteries, a sum of two input voltages (alternate voltage 4 Vdc and ~2.6 Vdc), and you can see in Multimeter the sum of two input voltages (6.89v). The production of the output voltage is now the sum of the inputs and is negative since the input provides the non-inverting terminal. And the voltage at point B will be the same as the voltage at point A, 0V, as seen in a closed-loop structure, which indicates that current I1 and I2 will be passing into resistor Rf (higher potential) rather than into the inverting terminal (lower potential) of the Op-amp. The Inverting Adder Circuit can be seen here with two inputs on the inverting input. Inverting adder is similar to the above amplifier, where any input voltages of the inverting terminal are supported but where the non-inverting terminal is focused, but there are several inputs on their inverting terminal that differ from that of the Inverting Adder circuit.
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