Designing a discrete wide-bandwidth, cost-sensitive instrumentation amplifier

RE: Designing a discrete wide-bandwidth, cost-sensitive instrumentation amplifier

Cole Macias — Thu, 02 Mar 2017 23:49:29 GMT

I've answered the recommendations in an email.

However, I find that it is important to state that you can remove RG1 and simulate the Wide BW INA in a gain of 1V/V. By removing RG1, RG1 in Equation 1 effectively approaches infinity. This approximately reduces the gain term to (1 + 0)(R2/R1).

I often simulate gain=1V/V using RG1 = 1T ohm so I do not have to delete the resistor, as shown in the schematics above.

-Cole

RE: Designing a discrete wide-bandwidth, cost-sensitive instrumentation amplifier

xyz xyz — Thu, 02 Mar 2017 16:26:05 GMT

Dear

I have one 0-50mV signal and the frequency range is between 10KHz to 5MHz. I want to measure the signal very accurately. (the price is not important)

I have simulated your circuit. But this is not perfect for my application.

Do you have any recommendations for me?

Can I open RG1 to have unity gain?

it's my email: golhaaa@gmail.com

Regards