Question About Voltage Shifting -1.65/+1.65 to 0-3.3V

[Hectoor]

Hi
I am trying to design a microphone amplifier for an ADC circuit. I am using TL082 opamp. Now I have a signal -1.65/+1.65. I want to shift it up to use it in ADC. I want 0-3.3V range. How can I use this opamp to shift voltage?

Thanks..

 

[erikl]

Seems this is an AC signal? You could simply separate the -1.65V offset by a CR-filter (resistor R to GND = 0V).

 

[Hectoor]

Seems this is an AC signal? You could simply separate the -1.65V offset by a CR-filter (resistor R to GND = 0V).

Yes, it is an AC Signal. Can you explain it a bit more?

 

[BradtheRad]

Here is how an op amp can lift your AC signal into the positive range.



This adds 1.7 V offset without an op amp, although it can attenuate your signal slightly:

 

[Hectoor]

Thank you very much. It worked!