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 ...

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 ...

Philips’ 35.2 to 37.6GHz inductor capacitor has novel output buffer Steve Bush Philips Electronics has revealed a 35.2 to 37.6GHz inductor capacitor (LC) VCO at ISSCC. Made using a 70GHz fT, 100GHz ...

[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 ...