How to make a reconfigurable circuit

[shaikss]

Hi,

I had designed a rectifier with 4 stages. I want to design a re configurable circuit in such a way that I can use either 2-stage or 3-stage of the rectifier depending upon the output voltage.
Output voltage depends on the distance between reader and tag. If both are near, then the output voltage is higher and sufficient to initialize the circuitary within the tag. So, at that instant, the output voltage at second stage is enough for me. In case, tag and reader are farther, I may need 3 stages of rectifier. Depending upon the output voltage at the second stage, I can have the flexibility to chose either second stage or the third stage. In such scenarios, please suggest me how to design a reconfigurable circuit for stage 2 and stage 3?

 

[chuckey]

Resistively add the three output together? Why not use a receiver with AGC? Why not use the most sensitive "rectifier" all the time?
Frank

 

[shaikss]

Resistively add the three output together? Why not use a receiver with AGC? Why not use the most sensitive "rectifier" all the time?
Frank

I have attached the circuit. Depending on the output voltage at third or fourth stage, I need to take a decision and reconfigure the circuit. If I can get an output voltage of 0.8v to 1V at the second/third stage, I want to give the output of that stage directly to regulator. In this scenario, I need some reconfiguration. So, how to build that circuit?