Part 1: Operational Amplifier (Op-Amp) Circuit Design & Analysis
1. Non-Inverting Amplifier Design
You need to design a non-inverting amplifier circuit using an ideal Op-Amp. The circuit should have a voltage gain of 8. You have a supply of standard resistors.
(a) Draw the circuit diagram for a non-inverting Op-Amp amplifier, clearly labeling the input voltage (Vin), output voltage (Vout), feedback resistor (Rf), and gain-setting resistor (Rg).
(b) If you choose a standard resistor value of Rg=10 kOhms, calculate the required value for the feedback resistor (Rf) to achieve the desired gain.
(c) If your power supply for the Op-Amp is ±12V, and your input signal (Vin) is a sinusoidal wave with a peak voltage of 2.5V, what would be the ideal peak voltage of the output waveform? Would the Op-Amp be operating within its linear range (i.e., not saturating)? Explain.
2. Inverting Amplifier Design & Output Analysis
You need to design an inverting amplifier circuit using an ideal Op-Amp. The circuit should have a voltage gain magnitude of -5.
(a) Draw the circuit diagram for an inverting Op-Amp amplifier, clearly labeling the input resistor (Rin), feedback resistor (Rf), input voltage (Vin), and output voltage (Vout).
(b) If you choose a standard resistor value of Rin=20 kOhms, calculate the required value for the feedback resistor (Rf) to achieve the desired gain.
(c) If the input voltage (Vin) is a DC voltage of 0.8V, and the Op-Amp is powered by ±10V supplies, what is the ideal output voltage (Vout)?
3. Op-Amp Limitations (Conceptual)
You have an Op-Amp circuit designed to amplify a sensor signal. The Op-Amp is powered by a single 0V to +5V power supply.
(a) If the circuit is an inverting amplifier and the input signal suddenly drops to -0.1V, what is the likely behavior of the output voltage, considering the single-supply limitation?
(b) What is "slew rate" in an Op-Amp, and why is it an important characteristic to consider when designing circuits that need to amplify rapidly changing signals (e.g., from a high-frequency vibration sensor)?