Colpitts. They are using Cob as the capacitor from collector to emitter
through the AC grounded base.

Jim

--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
--Aristotle


"Tim Williams" wrote in message
...
Reinartz? But that has two coupled windings in the C and E circuits.

Tim

--
Deep Friar: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms

"ian field" wrote in message
...
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.