positive inverter circuit

[arnarendra]

Hi,

I need a circuit which gives me an output with a reverse ramp.
For eg, when input is 1V, output should be 3V and when input is 3V output should be 1V (numbers are just indicative, will adjust the value for our requirements)

Thanks,
Naren

 

[michael58]

Hi,

I need a circuit which gives me an output with a reverse ramp.
For eg, when input is 1V, output should be 3V and when input is 3V output should be 1V (numbers are just indicative, will adjust the value for our requirements)

Thanks,
Naren

You have to use an inverting amplifier, see the attached for example. The output Vout=V2*(1+R2/R1)*(R4/(R3+R4))-V1*R2/R1.
So, the V1 is the input voltage, and V2 is the offset.