An acoustic sensor produces a signal that needs to be amplified to a peak voltage of 5.1textV5.1\\text{ V}5.1textV. The amplifier used has a voltage gain of 515151.
Calculate the peak input voltage VtextinV_{\\text{in}}Vtextin to the amplifier from the sensor.
The operational amplifier is configured in non-inverting mode. Determine, using two resistors selected from the list below, how a voltage gain of 515151 can be achieved: \
1.0\\text{ k}\\Omega, \\quad 3.3\\text{ k}\\Omega, \\quad 10\\text{ k}\\Omega, \\quad 50\\text{ k}\\Omega, \\quad 150\\text{ k}\\Omega{\char"24}$ Identify which resistor is $R_{\\text{in}}$ and which is $R_{\\text{f}}$.The signal frequency detected by the sensor is 45textkHz45\\text{ kHz}45textkHz. For this operational amplifier, the gain-bandwidth product is 1.8textMHz1.8\\text{ MHz}1.8textMHz.
Determine with support of a calculation whether this operational amplifier is suitable for amplifying the sensor's output with the required gain.
1 exam-style question on AQA A Level Physics Operational amplifier in:, covering inverting amplifier configuration (A-level only), non-inverting amplifier configuration (A-level only), summing amplifier configuration (A-level only), and Real operational amplifiers (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.