The most basic characteristic of a Voltage Controlled Oscillator (VCO) is the manner in which the oscillator changes frequency as a function of voltage applied to its tuning port. As the state of the ...
With a tuning range from 0.5V to 2.5V, the ZV950 series of hyperabrupt varactor diodes meets the requirements of 3V frequency control and filtering systems. The diodes are reported to be characterized ...
The paper presents a high selective reconfigurable band pass filter that has an adjustable center frequency and a constant absolute bandwidth tuning. The proposed filter has been designed through a ...
The original Article has been corrected.
[QRP Gaijin] likes to build regenerative receivers. If you’ve ever built a serious one, you know there are (at least) two problems: One is you need a variable capacitor (hard to find these days). The ...
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 used for ...
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 ...
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