Varactor (or “varicap”) diodes are used primarily in radio-frequency (RF) circuits to provide a capacitance that can be varied by changing the applied voltage. These types of diodes often are ...

They have none of the special skills you’d find in tunnel, Gunn, varicap ... To illustrate a basic diode switch, we’ve prepared a couple of simplified circuit diagrams. The first shows ...

There was a time when all radio receivers contained at least one, now with the advent of the varicap diode and the frequency ... the inductive part of a tuned circuit, but this coil is shorted ...

How does a varactor diode work? To form the PN junction that makes a diode, half the piece is doped with a trace amount of “donor atoms” that have one more electron than the intrinsic stuff to make ...

D1 is a varicap diode ( like a variable capacitor or trimmer ... MHz in antiphase and the 2 signals are combined to form 100MHz fm radio signal. This kind of circuit design is stabile and is amplified ...

The 2SC3607 LNA, available in a PW-MINI package, costs $0.49 each. In a USC package, the 1SV271 tuning varicap diode sells for $0.19 each. Three RF amplifiers are available configured as 9-V dual ...