I'm currently designing a circuit where I need to implement multiple op-amps, each configured with the same variable gain resistor using a single digital potentiometer.

To simplify the design and reduce component count, I'd like to use the same gain resistor (which is a digital potentiometers in my case) across all op-amps. However, I'm unsure about the best approach to achieve this.

Here is my drawing:

From my understanding, instrumentation amplifiers share a single gain resistor (R1 in the picture below) with two input buffers in the first stage before feeding into a differential amplifier (green box):

Picture from https://www.electronics-tutorials.ws/opamp/opamp_5.html.

This is exactly what I need, but I couldn't find any way to extend this configuration for more than 2 op-amps (I need for 4 op-amps at the moment).

I'm wondering if there are any techniques or best practices for ensuring that the gain resistor is properly matched and that the gain remains consistent across all op-amps.

If anyone has experience or insights into efficiently using the same gain resistor among multiple op-amps, I would greatly appreciate any guidance or suggestions.

I'm currently designing a circuit where I need to implement multiple op-amps, each configured with the same variable gain resistor using a single digital potentiometer.

To simplify the design and reduce component count, I'd like to use the same gain resistor (which is a digital potentiometers in my case) across all op-amps. However, I'm unsure about the best approach to achieve this.

Here is my drawing:

From my understanding, instrumentation amplifiers share a single gain resistor (R1 in the picture below) with two input buffers in the first stage before feeding into a differential amplifier (green box):

Image source: Electronics Tutorials - High Input Impedance Instrumentation Amplifier

This is exactly what I need, but I couldn't find any way to extend this configuration for more than 2 op-amps (I need for 4 op-amps at the moment).

I'm wondering if there are any techniques or best practices for ensuring that the gain resistor is properly matched and that the gain remains consistent across all op-amps.

If anyone has experience or insights into efficiently using the same gain resistor among multiple op-amps, I would greatly appreciate any guidance or suggestions.

I'm currently designing a circuit where I need to implement multiple op-amps, each configured with the same variable gain resistor using a single digital potentiometer.

To simplify the design and reduce component count, I'd like to use the same gain resistor (which is a digital potentiometers in my case) across all op-amps. However, I'm unsure about the best approach to achieve this.

From my understanding, instrumentation amplifiers share a single gain resistor (R1 in the picture below) with two input buffers in the first stage before feeding into a differential amplifier (green box):

This is exactly what I need, but I couldn't find any way to extend this configuration for more than 2 op-amps (I need for 4 op-amps at the moment).

I'm wondering if there are any techniques or best practices for ensuring that the gain resistor is properly matched and that the gain remains consistent across all op-amps.

If anyone has experience or insights into efficiently using the same gain resistor among multiple op-amps, I would greatly appreciate any guidance or suggestions.

I'm currently designing a circuit where I need to implement multiple op-amps, each configured with the same variable gain resistor using a single digital potentiometer.

To simplify the design and reduce component count, I'd like to use the same gain resistor (which is a digital potentiometers in my case) across all op-amps. However, I'm unsure about the best approach to achieve this.

Here is my drawing:

From my understanding, instrumentation amplifiers share a single gain resistor (R1 in the picture below) with two input buffers in the first stage before feeding into a differential amplifier (green box):

Picture from https://www.electronics-tutorials.ws/opamp/opamp_5.html.

This is exactly what I need, but I couldn't find any way to extend this configuration for more than 2 op-amps (I need for 4 op-amps at the moment).

I'm wondering if there are any techniques or best practices for ensuring that the gain resistor is properly matched and that the gain remains consistent across all op-amps.

If anyone has experience or insights into efficiently using the same gain resistor among multiple op-amps, I would greatly appreciate any guidance or suggestions.

I'm currently designing a circuit where I need to implement multiple op-amps, each configured with the same variable gain resistor using single digital potentiometer.

To simplify the design and reduce component count, I'd like to use the same gain resistor (which is digital potentiometers in my case) across all op-amps. However, I'm unsure about the best approach to achieve this.

from my undrestanding, instrumentation amplifiers share single gain resistor (R1 in picture below) with two input buffers in first stage before feeding into differential amplifier (Green box)

this is exactly what I need but I couldn't find any way to extend this configuration for more that 2 op-amps, (I need for 4 op-amps at the moment)

I'm wondering if there are any techniques or best practices for ensuring that the gain resistor is properly matched and that the gain remains consistent across all op-amps.

If anyone has experience or insights into efficiently using the same gain resistor among multiple op-amps, I would greatly appreciate any guidance or suggestions.

I'm currently designing a circuit where I need to implement multiple op-amps, each configured with the same variable gain resistor using a single digital potentiometer.

To simplify the design and reduce component count, I'd like to use the same gain resistor (which is a digital potentiometers in my case) across all op-amps. However, I'm unsure about the best approach to achieve this.

From my understanding, instrumentation amplifiers share a single gain resistor (R1 in the picture below) with two input buffers in the first stage before feeding into a differential amplifier (green box):

This is exactly what I need, but I couldn't find any way to extend this configuration for more than 2 op-amps (I need for 4 op-amps at the moment).

I'm wondering if there are any techniques or best practices for ensuring that the gain resistor is properly matched and that the gain remains consistent across all op-amps.

If anyone has experience or insights into efficiently using the same gain resistor among multiple op-amps, I would greatly appreciate any guidance or suggestions.