I want to convert analog voltage as below:
if input 0V : output 1.6V
if input 5V : output 0.6V
I can i do that? Using which circuit?

 

Welcome to AAC!
It's doable. What are the input and output tolerances you need?
What provides the input signal?
Do you want to use discrete components or a microprocessor?

 

Voltage provides from DAC circuit (LTC2644) Because I convert pwm duty to a voltage range 0V-5V. And after that, I need a linear precision 0.6V to 1.6V with confortable tolerance using discrete components (no microprocessor).

 

hi TD,
I assume that OPA's are ok.?
E

 

hi TD,
I assume that OPA's are ok.?
E

Yes, OPA can be used for.

 

hi,
This is one option, using a dual MCP6002 OPA.
As the output impedance of the signal source is not known, the initial buffer has been added.
E

Corrected.!

 

Good option! Very simple! I will try it.
Many thanks.
If another solution could match, please, share it!

 

hi TD,
There is a circuit error on that diagram, I will correct and repost.
Eric

EDIT:
Corrected input circuit, reposted. in post #6

 

This is one option, using a dual MCP6002 OPA.

He wanted an inversion in the signal slope.

if input 0V : output 1.6V
if input 5V : output 0.6V

 

I will repost a modified circuit.
Thanks for the heads up.

 

hi Teddy,
This circuit is for
if input 0V : output 1.6V
if input 5V : output 0.6V

Added:
Set Up
1. Set the Vinput Source of the 1st OPA to 5v, adjust R7 so that Vout of the 1st OPA is 1v.

2. Set the Vinput Source of the 1st OPA to 0v. adjust R2 so that Vout of the 2nd OPA is 1.6v

3. Reconnect the Vinput Source to the DAC output.


I will leave the earlier circuit posted, just in case you have it reversed, like I did.
I misread as:
if input 5V : output 1.6V
if input 0V : output 0.6V

Eric

 

Thanks Eric. I will adjust R values depending results after wiring.

 

Here's a single op amp version:
The minor disadvantage of this single amp is that the offset voltage is affected by the gain setting, so you must first set the gain to give a 1Vpp signal swing, and then adjust the offset (which does not affect the gain) to the desired value.

 

Thanks Crutschow ! Good too !

 

Hello,
I made the circuit according Ericgibbs solution. It works fine ! Thanks again.