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 ...

This file type includes high-resolution graphics and schematics when applicable. 1. Bob Pease built this varactor-input op-amp out of discrete components, based on an old design of Jim Williams. A ...

Today, most GSM handsets use voltage-controlled, temperature-compensated crystal oscillator (VC-TCXO) modules as the system reference oscillator. To establish and maintain a robust wireless connection ...

The frequency around 1 THz between radio waves and light is called the terahertz band (or submillimeter waveband, far infrared), and has yet to be developed. Light sources and detectors that generate ...