Your engineering team has been hired by a company to design an op-amp configuration for an item's circuit. This item circuit requires an output voltage, Vo, that needs to be the opposite polarity (opposite sign) of the input voltage, Vs. It also has to be 5 times greater in magnitude than Vs.
You have 3 resistor sizes available to use: 2 kΩ, 7 kΩ, 10 kΩ (you can use as many of each as you need). You can assume the op-amp is ideal. The circuit configuration is shown below:
- What is the required gain for this op-amp design based on the design description above?
- Set up the equation(s) to find the relationship between the resistors and the gain of the circuit (the "gain equation"). Be sure to show your derivation in detail.
- What type of op-amp configuration is this?
- Using the resistors provided, design this op-amp circuit to perform the task described above. Label each resistor and its numerical value.
- What is the impact of resistors Ro & R1 on the gain of this design?
- What is one or more reasons for using Op-Amp in this design?
- The company found the resistor is too costly - What are the possible alternatives (regarding the resistor) that you could give to bring the cost down? [Note: you can change the circuit configuration – all resistors have an impact on the design, even if they don’t impact the gain]
WWM
R2 WMM
+
V
1o Ro
O