Ideally the output voltage is driven to whatever voltage balances the op-amp, assuming negative feedback and infinite gain. The voltage at the non-inverting input is just the mid-point of another voltage divider and the instructor has made it easier on you by setting one end to zero. What you have is a summing amplifier, which will get the signals coming from v1 and v2 in order to sum them and multiply by a constant and such is defined by resistors values in the circuit.
And yes the voltage in the non-inverting input is going to be equal to the inverting input. With this information you might now be able to figure out what the voltage in the input should be. Sign up to join this community. The best answers are voted up and rise to the top.
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Iron Maiden Iron Maiden 1, 6 6 silver badges 17 17 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. R1 applies negative feedback back to terminal 1 inverting terminal ; one terminal of R2 is connected to ground. Similarly, whatever voltage is at terminal 2 will automatically appear at terminal 1 because of the infinite open-loop gain A.
The gain of the non-inverting configuration is positive, hence the name non-inverting. The input impedance of this closed-loop amplifier is ideally infinite, since no current flows into the positive input terminal of the op-amp. This means the output resistance of the non-inverting configuration is zero.
Putting these properties together, we arrived at the equivalent circuit model of the non-inverting amplifier configuration, shown in the equivalent circuit model on the right. This model is obtained under the assumption that the op-amp is ideal. Return to Top. Development Tools What tools do I need? Packs vs. What is contained in DFPs? How are DFPs Distributed? Add Existing Items From Folders Overview II.
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The inverting input is not connected to ground- rather it is connected to a voltage divider between the op-amp output and ground. This circuit is a noninverting op amp circuit used to amplify the source input. Amplifiers are used in most clinical instrumentation, including ECK, EEG. Non-inverting amplifiers are the second closed-loop configuration of an op-amp. In the figure below, the input signal VIN is applied directly to the.