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?

In the circuit pictured below, R1=100Ohm and R2 is the potentiometer shown on the left.   If we want to use the circuit to power a 6V device connected to Vout with a 9V battery connected to Vin, what resistance (in Ohms) should the potentiometer be set to?

Given that R1=3kOHM, R4=6kOHM, R2=5kOHM, R3= 10kOHM, Rf1=20kOHM, Rf2=20kOHM, what would be the value of Vout if Vin1=Vin2=Vin3=1 V?

A first-order passive high pass filter with load resistor circuit is shown as below:   If R= 10kΩ, C=0.01uF, What is the cutoff frequency for this filter in Hz?

The circuit below is a variable gain amplifier. Suppose Rf =1000 Ohm, JFET has the threshold voltage of -0.3V and corresponding resistance shown in the table, what is the maximum and minimum gain for this amplifier as the control voltage is varied from 0 to Vth? DC control voltage of JFET (V) Resistance of JFET (Ohm) 0.0 200 -0.3 infinite