27-05-2013, 01:08 PM
Operational Amplifier
Operational Amplifier.pptx (Size: 233.94 KB / Downloads: 29)
Non Inverting Amplifier
Inverting Amplifier
Adder (and Subtractor using an Inverter)
Differential Amplifier
Integrator
Differentiator
Three Ways to Examine Op-Amp Behavior
Consider as an Ideal Op-Amp Component
Consider as a Feedback Model and Examine Behavior
Perform Conventional Circuit Analysis
Differential amplifier is a closed loop amplifier circuit which amplifies the difference between two signals. Such a circuit is very useful in instrumentation systems. Differential amplifiers have high common mode rejection ratio (CMRR) and high input impedance. Differential amplifiers can be made using one opamp or two opamps. Both of these configurations are explained here.
The Summing Amplifier
The Summing Amplifier is a very flexible circuit based upon the standard Inverting Operational Amplifier configuration that can be used for combining multiple inputs. We saw previously in the inverting amplifier tutorial that the inverting amplifier has a single input voltage, ( Vin ) applied to the inverting input terminal. If we add more input resistors to the input, each equal in value to the original input resistor, Rin we end up with another operational amplifier circuit called a Summing Amplifier, "summing inverter" or even a "voltage adder" circuit as shown below