bcarso
Well-known member
This is the blurb that caught my eye:
"
An industry first: stable voltage, no liquid helium
For years, the electronics industry has relied on Zener-diode voltage generators, despite expense of supplying them with liquid helium. A Japanese institute, after packing 300,000 niobium nitride Josephson devices on a single chip, says it's time for a change. Continue...
"
Bet you didn't realize we've had to cool our zener diodes with helium!
But if you click on Continue and get into the text, it's about a slightly higher temperature operation of Josephson junctions, in a two-chip series-connected array (for higher yields), to get 10V. The zener secondary standard is something else altogether, and way noisier/higher drift, as one would suppose.
http://www.rdmag.com/ShowPR.aspx?PUBCODE=014&ACCT=1400000100&ISSUE=0802&RELTYPE=MS&PRODCODE=0000000&PRODLETT=LC&CommonCount=0
"
An industry first: stable voltage, no liquid helium
For years, the electronics industry has relied on Zener-diode voltage generators, despite expense of supplying them with liquid helium. A Japanese institute, after packing 300,000 niobium nitride Josephson devices on a single chip, says it's time for a change. Continue...
"
Bet you didn't realize we've had to cool our zener diodes with helium!
But if you click on Continue and get into the text, it's about a slightly higher temperature operation of Josephson junctions, in a two-chip series-connected array (for higher yields), to get 10V. The zener secondary standard is something else altogether, and way noisier/higher drift, as one would suppose.
http://www.rdmag.com/ShowPR.aspx?PUBCODE=014&ACCT=1400000100&ISSUE=0802&RELTYPE=MS&PRODCODE=0000000&PRODLETT=LC&CommonCount=0
