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Darlington Transistors At RF?
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March 18th 05, 08:39 AM
Paul Keinanen
Posts: n/a
On 17 Mar 2005 22:45:11 -0800,
wrote:
Does anyone know if a Darlington transistor (IC of two transistors in
Darlington congifuration) can be biased at class C for use in an output
stage of a VHF transmitter? Darlingtons seem to have pretty high gain,
so I supposed they could reduce the number of stages required to
amplify an RF signal? Thanks in advance.
You have to look at the fT parameter (which specifies the frequency at
which _current_ gain drops to unity), since a typical power darlington
is a very slow device.
Paul OH3LWR
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