Both the "Type II PHSNA" and the "Experimenter Board" are set up to use a center-tapped broadband transformer to utilize both sine wave outputs of the AD9850/51. Schematics are in the Files area. It works very well and does give some increased output, but not enough to reach the +10 dBm level without additional amplification. The push-pull approach also provides some cancellation of even harmonics.
---In PHSNA@..., <mendiola_loyola@...> wrote :
Have you used Differential Transformer 1:1 to get more voltage peak 2 peak from the AD9851?
The datasheet has a diagram showing a Differential Transformer 1:1 connected to the two AD9851 differential outputs.
Is it better to use transformers instead of opamps amplifiers?
I will work from 1 Mhz to 30 Mhz.
Actually my Ad9851 modules is giving 250 mv peak 2 peak with a 50 ohm resistor load.
Alfredo Mendiola Loyola