Minimum voltage selector

[shaq]

Dear all,

If I have 4-voltage, they are A = 0.3V, B = 0.2V, C = 0.5V and D = 0.4V

In this case, B is minimum.

I need a circuit which can select the minmum voltage. How to design the minimum voltage selector?

(Do not use ADC)

 

[mister_rf]

To select or just to indicate the minimum voltage?
Is this a theoretical situation with fixed values for A, B, C, D ​​or later these values can change?

 

[shaq]

Dear mister_rf ,

These are can be changed.

 

[andre_luis]

Take a look here :

ANALOG VOLTAGE SELECTOR CIRCUIT WITH SELECTED VOLTAGE DETECTION

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