A wideband Colpitts VCO with 30% continuous frequency tuning range using a tunable phase shifter

• Published in: 2010 IEEE International Conference of Electron Devices and Solid-State Circuits pp. 1 - 4
• Main Authors: Ying Chen, Mouthaan, K, Geurts, M
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.12.2010
• Subjects: Colpitts oscillator; Frequency measurement; Harmonic analysis; Phase shifters; Resonant frequency; tunable phase shifter; Tuning; VCO; Voltage-controlled oscillators; Wideband

A wideband Colpitts VCO using an analog tunable phase shifter as the frequency tuning component is presented. The tunable phase shifter is used as the resonator in a common collector Colpitts oscillator. An inductor is added in series with one of the feedback capacitors to avoid oscillation at highe...