D6 Learning Task 11

Question 1

Open-loop mode

Answer 1

is very high gain but unstable

Question 2

Op-amps

Answer 2

have two inputs
(-) inverting
(+) non-inverting

Question 3

Differential amplifier

Answer 3

Vout=Vdiff x Aol

Question 4

Op-amp comparator

Answer 4

one is fixed reference voltage other is feedback voltage

Question 5

An op-amp has a very high input impedance

Answer 5

and low output impedance

Question 6

Inverting amplifier

Answer 6

the non-inverting input is grounded and the input signal goes to the inverting input.
output signal will be 180 degrees out of phase with input

Question 7

Non-inverting amplifier

Answer 7

inverted input is grounded
input signal goes to the non-inverting input
output is in phase with input

Question 8

Summing-amplifier

Answer 8

adds together two or more voltages at the inputs, and amplifies them at the output
Vout = -( V1(Rf/R1) + V2(Rf/R1) +V3*(Rf/R1))