Vin1 is a 1 Vpp sine wave with frequency 800 Hz. Vin2 is a 1 Vpp sine wave with frequency 5 kHz. Vin3 is a 1 Vpp sine wave with frequency 600 Hz. If we use the FFT in oscilloscope at Vout, at which frequency(s) would we the highest peak?   

Based on the structure of a peak-hold circuit, what would happen if we replace R1 with a short circuit?

Higher ripple voltage is preferred for a better voltage regulation.

The non-inverting amplifier has two resistors 4kΩ and 20kΩ. When input voltage Vin= 1V, what is the output voltage at the output Vout?

Examine the schematic shown, that may be thought of as an extension of an inverting amplifier. The input/output relationship is given by   Vout = -2 Vin 1 -1.95 Vin 2 – Vin 3. If the feedback resistor is 3.9 kΩ, what would be the value of R2 in Ohms?    

Here is the design of an active low-pass filter. We load the output load with 0.01uF.  What is the cut-off frequency of this filter in Hz? You can ignore the load capacitor.

In experiment 4, the primary purpose of switching from a passive to an active high pass filter was to increase the gain in the pass-band.

What kind of feedback does this op-amp amplifier use?

The figure depicts the frequency response of a 2nd order low-pass filter. At what frequency is the roll-off slope closest to -40dB/decade?

The peak hold circuit is shown as below: Given that R1=10kΩ , C= 1uF, what is the time constant in ms?