Recent content by jeuhyis

Here's a screen shot of what I've been designing. I am happy with the overall performance of the circuit, its being used within a group to create a sound level meter, and i have this working as a Type 0 with a 60dB dynamic range.

Its for an input offset voltage on the non-inverting input of an op-amp to give a zero voltage output. I spent ages designing an RMS circuit for a sound level meter and then I hit this problem. Managed to figure out what offset was required simulated that circuit but then I could remember how to...

So therefore using this R = 10*8.87/(10+8.87) KOhms = 4.7KOhms V = (9+9)8.87/(10+8.87) - 9 Volts = -0.53895V So then is there some calculation required using the 500K and 1K utilising the -0.53895V to reach the 10mV? Thanks for your help so far

Hi first time poster. I'm a little stuck, through trial and error on Mentor graphics I was able to create the attached circuit. Using +&- 9V supply rails I managed to output -10mV, which I required. Now I have come round to try and work it out by hand I'm struggling to remember how! I know that...