In message <[EMAIL PROTECTED]>, Alberto di Bene writes: >Brooke Clarke wrote: > >> A PIN diode is great for switching RF frequencies above the diode's >lifetime. But not so good at switching DC coupled signals. >> The FET type switches, like the MAX458 are designed for switching DC >coupled signals. > >Does anybody know what the HP 59307A uses ? It can switch from DC to 500 >MHz and the measured DC resistance is on the order of 0.2 ohm. Looking >into the unit reveals that the switching device is shaped like a fat IC, >thermally coupled with the back panel.
Mostly it uses reed-relays I think. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
