unipolar to bipolar conversion

[student13]

Hello all,

I want to convert digital uniploar signal to digital bipolar signal. for ex: 12 bit unsigned to 12 bit signed format. can anyone help me?

 

[FvM]

The question isn't clear. 12-Bit unsigned has a numeric range of 0 to 4095, signed of -2048 to 2047, how to you intend to map the values?

 

[treqer]

enough to subtract 2047

 

[FvM]

enough to subtract 2047

If the intended mapping is substracting an offset, then you would substract 2048 respectively invert the MSB, which is a single bit operation.

 

[student13]

i have attached a diagram. in that i have the 2 currents (V phase and W phase) from IR2175 module which are unsigned and 12 bits. now i want to know how to convert these to the output of unipolar to bipolar module which are 12 bit signed. i think U phase current = -(V + W), but how to get V and W in signed format is my doubt.

 

[student13]

the attachment is in this post.

 

[FvM]

i have the 2 currents (V phase and W phase) from IR2175 module which are unsigned and 12 bits

IR2175 has a PWM output, so it's still isn't exactly clear, how the bipolar current measurement is represented. Assuming regular straight binary coding, it works like said in post #3 or #4.