EMRFD Message Archive 2532

Message Date From Subject
2532 2008-12-30 06:01:42 Kenneth Stringham Differential LO Drive

Tim,

Look at the internal circuitry in the DBM devices. The ring diode type mixers will gain no advantage with differential drive. Only the active type mixers represented by the SA-602 type mixers can achieve improved performance with this type of drive.

Ken - AE1X

2533 2008-12-30 06:21:11 Jim Miller Re: Differential LO Drive

i think that's true only if you have relatively high supply voltages.
if you have a 3.3v system and take into consideration diode drops,
vcesat, etc you might want to have a differential drive to ensure
sufficient forward voltage and drive current across the two diode
drops.

73

jim ab3cv

2532	2008-12-30 06:01:42	Kenneth Stringham	Differential LO Drive
Message	Date	From	Subject
Tim, Look at the internal circuitry in the DBM devices. The ring diode type mixers will gain no advantage with differential drive. Only the active type mixers represented by the SA-602 type mixers can achieve improved performance with this type of drive. Ken - AE1X
2533	2008-12-30 06:21:11	Jim Miller	Re: Differential LO Drive
i think that's true only if you have relatively high supply voltages. if you have a 3.3v system and take into consideration diode drops, vcesat, etc you might want to have a differential drive to ensure sufficient forward voltage and drive current across the two diode drops. 73 jim ab3cv