# What is the use of feedback resistor in op-amp?

What is the use of feedback resistor in op-amp? Transresistance Amplifier Circuit The feedback resistor Rƒ sets the operating voltage point at the inverting input and controls the amount of output. The output voltage is

## What is the use of feedback resistor in op-amp?

Transresistance Amplifier Circuit The feedback resistor Rƒ sets the operating voltage point at the inverting input and controls the amount of output. The output voltage is given as Vout = Is x Rƒ. Therefore, the output voltage is proportional to the amount of input current generated by the photo-diode.

## What is the feedback element in an op-amp integrator?

Capacitor is used as the feedback element in an. op – amp integrator.

What is the feedback resistance in the op-amp comparator circuit?

Op-amp Comparator with Positive Feedback As its name implies, positive feedback is a technique for feeding back a part or fraction of the output signal that is in phase to the non-inverting input of the op-amp via a potential divider set up by two resistors with the amount of feedback being proportional to their ratio.

### How op-amp is used in integrator?

As an op-amp integrator performs the function of mathematical integration. However, it can be used in analog computers. The operation of this circuit is, it generates an output which is proportional to the input voltage with time. So the output voltage will be determined with the primary output voltage at any time.

### Why positive feedback is not used in op amp?

Then we can see that positive feedback does not allow the circuit to function as an amplifier as the output voltage quickly saturates to one supply rail or the other, because with positive feedback loops “more leads to more” and “less leads to less”.

What is the ideal CMRR of op amp?

Ideally, CMRR is infinite. A typical value for CMRR would be 100 dB. In other words, if an op amp had both desired (i.e., differential) and common-mode signals at its input that were the same size, the common-mode signal would be 100 dB smaller than the desired signal at the output.

## What system is comparator used for?

Explanation: Comparators are used in mass production where components are checked at a fast rate. These can be used as inspection purposes, laboratory standards and working standards or gauges.