Design and implement a minimalist but practically usable regenerative receiver capable of HF reception from 3-30 MHz. Analyze the key aspects of the receiver’s operation (e.g. behavior of the ...

[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 ...

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 ...

A typical voltage-to-frequencyconverter—also known as aVCO (voltage-controlled oscillator)—IC has a simple linear tuning characteristicrelating input voltage to outputfrequency. It is usually of the ...

Designed to control the frequency of crystal oscillator circuits, the 3022 series of high-ratio, hyperabrupt varactor tuning diodes is designed to deliver a dc bias control voltage from -0.3V to -4V.

Various configurations (Colpitts, Pierce, Clapp etc) are described in literature [Ref(1)]. Depending on the frequency requirements, various devices like MESFETs, pHEMTs, and HBTs can be used for VCO ...