"legg" wrote in message
...
On Mon, 25 Aug 2008 17:27:35 +0100, "ian field"
wrote:
"Spehro Pefhany" wrote in message
. ..
On Mon, 25 Aug 2008 16:25:02 +0100, "ian field"
wrote:
Anyone know the correct name of the oscillator which is essentially a
grounded base amplifier with a small capacitor from collector to
emitter?
These are common in very cheap TV modulators and 433MHz keyfob and
wireless
doorbell buttons etc.
Any help appreciated.
TIA.
This one?
http://en.wikipedia.org/wiki/Colpitts_oscillator
None that I've seen so far have C2 as in the wiki entry.
C2 is free in a bipolar device.
In the lack of any better suggestions I'm looking into the possibility that
it might be a capacitively coupled variant of the Meissner oscillator.
Although it probably has a name of its own.