Task $1$: Building the full device

For the lab assignment you will connect the four stages with the values that you obtained in the pre$-$lab assignment to build the full heart rate monitor device. A simplified schematic is shown below. Notice that the power supplies are not shown due to space constraints, but you need to include them for the simulation.

For the input voltage, the $AC$ small$-$signal voltage as described in the pre$-$lab section. Use the power supplies with the same specifications as described in the pre$-$lab section $(+-5V),$ and as the output connect a $1k$ resistor to measure the output voltage.

Deliverable $1$:

$2)$ What can it be concluded about the role of the low$-$pass filter in stage TWO and the voltage buffer i stage $3$ for the heart rate monitor?

$3)$ What can it be concluded about the role of the active low$-$pass filter in stage FOUR for the heart rate monitor?

$4)$ Based on the frequency response plot of the full device, which range frequencies are amplified? Do these frequencies correspond to the avarage heart rate frequency?

$5)$ which changes or improvements would it help this four$-$stage filter to work better at amplifying the heart rate frequencies while minimizing noise?