Hi Steward, Andy and group, I am not sure about the physics of this. The 90deg phase shifter has to be some sort of dispersion device (propagation time varies with frequency), and this will operate o
Just thinking about this a little more, if you could generate the right dispersion characteristics in the IF phase shifter, can't you do the whole thing with a single mixer and IF processing? Stewart
I am not sure about the physics of this. The 90deg phase shifter has to be some sort of dispersion device (propagation time varies with frequency), and this will operate on the fourier components of
Hi Andy and group, forgotten to mention this in my questionable explanation: For "adding" the 90° phase shift in the sin() and cos() arguments, it's most important that the arguments are positive, wh
Think I got it... The output from the upper mixer branch is: sin(a+b) - sin(a-b) The assumption "delayed this by 90 degrees" should give cos(a+b) - cos(a-b) does not look right in my opinion. Instead
Yes that is correct according to the sheet of trig identities on the wall above my desk. But as I wrote it, the top mixer input is not SIN(A) and COS(B), as the LO signal does not have the 90 degree
