How to get a phase range from 0° to 360° from a AD8302?

[bibijons]

ad8302 phase

hi,
has anybody an idea how i can get out of the AD8302 a phase range from 0 to 360°?
in the datasheet they say.
"at higher frequencies, the finite rise and fall times of the amplitude limited inputs create an ambigious situation that leads to inaccessible dead zones at the 0° and 180° limits."

my idea was to use a branchline coupler to move the phase 90°.on each branch i put the AD8302.
do i need more than 1 coupler to get 360°?

is the pll important in this case?

thanks for help

bibijons[/quote]

 

[vfone]

Re: AD8302

AD8302 can measure phase only between 0 and 180 degrees.

 

[bibijons]

Re: AD8302

thanks for showing me the datasheet, but i read it.

i know from the datasheet that with 1 Ad8302 the phase is between 0° and 180°.
but i want to realize 360°. maybe thats not possible with 1 AD8302 but why not use 2 and put them together.

right now, i'm on designing.
why shouldn't it work?

bibijons

 

[bibijons]

Re: AD8302

i finished my design with the 2AD8302.

i put it on the networkanalyzer and got the following results:
VMag(1)= 0.1V
VMag(2)=1.8V

VPhs(1)=1.2V
VPhs(2)=1.3V

so i compared these datas with the datasheet, i realized the total range and have a approximatly a phasediffrence of 90°. can this be right?

how do i know if i designed the spitter right, am i supposed to get the 60dB range?
how can i change the phase for example from -90° to 0° ?

thx