Do you have differential tunable filters, or is there a balun or something similar between the synthesizer and the tunable filter in practice?

Question

Many PLL/synthesizers utilize differential signals as their outputs. In slide 3 a tunable filter is shown at the output of the PLL/synthesizer.

matthew.parker · Accepted Answer

At this time we do not offer Tunable Filters with differential outputs. All of our Tunable Filters are Single-Ended outputs. We are working on new PLL+VCO parts in a single package that can support both single-ended and differential outputs.)

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Do you have differential tunable filters, or is there a balun or something similar between the synthesizer and the tunable filter in practice?