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A woman is a carrier for a genetic disorder.  She has

If the carrier signal is 50kHz and the modulating signal is 2 kHz, what would be the envelope frequency of the amplitude modulated (AM) signal in kHz?

For the circuit shown below, RF is 4 kOhm.. The input signals are given by Vin1 : a 2 Vpp sine wave with frequency 1 kHz.  Vin2 : 1 V DC The output waveform is observed to be  a 1 Vpp sine wave with -1 V of DC offset. What is the value of R1? Express your answer in kOhms.         

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?

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

Higher ripple voltage is preferred for a better voltage regulation.

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.