Re: Fast sampler

On 6/03/2025 10:20 am, Phil Hobbs wrote:

Hi, All,
 Late last year we did a fast sampler/TDR with nice clean 60 ps edges.
 We're gearing up to actually sell them, so I did a short technical writeup on the design, which may be of interest.
 <https://electrooptical.net/News/a-high-performance-time-domain-reflectometer>

Cute. When I got stuck with driving a diode bridge, I used a transmission line transformer to get a perfectly balanced drive.
As Kibble and Rayner point out, carefully wound (and that means a non-progressive winding) 1:1 transformers can get to one part per billion balance. Other ratios tend not to let themselves get pushed beyond one part in ten million.
--
Bill Sloman, Sydney