Questions tagged [varicap]
Varicaps are electronic components with a variable capacitance. They are a type of diode that, when operated under reverse bias, vary the width of their depletion zone and therefore their capacitance.
3
questions
1
vote
1answer
190 views
How to generate FM narrowband using varactors
I don't really understand how FM narrow band is created, and at the same time I can't figure out how using this simple circuit of varactors (varicap diodes) we narrow the bandwidth.
simulate this ...
2
votes
1answer
71 views
Does the varactor bias supply have to be independent of Vcc?
A quick follow-up to How can I tell the frequency without an oscilloscope, or frequency counter?
My supply is a transformer plucked from a dead power adapter rated for 1.5A. This is rectified cap-...
9
votes
1answer
94 views
Can two diodes be parallelled in RB to get double the capacitance?
It's a fact of life that air-gang capacitors, are increasingly more difficult to come by - having been superseded by the far more compact varactor diodes.
My part of the world components such as the ...
