S
sjcma
- Jan 1, 1970
- 0
Hi,
I'm hoping someone can enlighten me on the definition(s) of a Colpitts
oscillator. I've seen many circuits diagrams that show a Colpitts
oscillator, but they don't always look the same.
Assuming an NPN device, some show the capacitive feedback from collector
to emitter, some show the capacitor feedback from emitter to base, and
some show the tap between the 2 tank capacitors grounded. I've seen
circuits that are common base, common emitter, and common collector all
claming to be Colpitts.
What's the common link between all these circuits besides tapping the
tank in between two capacitors and connecting it somewhere (sometimes,
even ground!).
If someone feels like typing a lot, perhaps a quick explanation of the
advantages of each topology would be nice
Thanks in advance.
sjcma
I'm hoping someone can enlighten me on the definition(s) of a Colpitts
oscillator. I've seen many circuits diagrams that show a Colpitts
oscillator, but they don't always look the same.
Assuming an NPN device, some show the capacitive feedback from collector
to emitter, some show the capacitor feedback from emitter to base, and
some show the tap between the 2 tank capacitors grounded. I've seen
circuits that are common base, common emitter, and common collector all
claming to be Colpitts.
What's the common link between all these circuits besides tapping the
tank in between two capacitors and connecting it somewhere (sometimes,
even ground!).
If someone feels like typing a lot, perhaps a quick explanation of the
advantages of each topology would be nice
Thanks in advance.
sjcma