812A on a chip?

Nigel Holmes 03 9626 1914 fax 03 9626 1917 holmes.nigel at ABC.NET.AU
Thu May 23 02:00:43 EDT 2002

Someone might care to pass this on to Glowbugs if it hasn't already been
seen there.

Thermionic technology rules, OK! (as they say in the UK)

Now I need an on-chip replacement for a 4CV100,000E


Nigel Holmes   VK3ZNQ

ON-CHIP VACUUM MICROTRIODE.  Integrated, solid-state
design had many advantages over the old vacuum-tube style
electronics.  But some of the tube characteristics, such as the ability
to handle high power, might be nice to have on a chip.  With carbon
nanotubes, acting as miniature emitters of electrons, this might be
possible (See Update 454,
http://www.aip.org/enews/physnews/1999/split/pnu454-2.htm).  A
new innovation in this regard is the development of an on-chip
system of vacuum triodes.  Scientists at Agere Systems (a company
spun off from Lucent Technologies) build their chip using
microelectromechanical (MEMS) technology; a lateral field of
carbon nanotubes is grown on a cathode which can then be rotated
into a vertical position in order to face a grid (10 microns away) and
anode (100 microns away).  Radar, electronic warfare, and satellite
communications are expected to be the chief applications areas.
(Bower et al., Applied Physics Letters, 20 May 2002; contact W.
Zhu, wzhu at agere.com)

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