The design of double-positive-feedback voltage-controlled oscillator

Zue Der Huang*, Chung-Yu Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


A 24 GHz 1.4-mW double-positive-feedback voltage-controlled oscillator (DPF-VCO) has been designed and realized in a 0.13 μm CMOS process. In the proposed DPF-VCO, the concept of double positive feedback loops is adopted to enhance the VCO performance and the current-mode output technique is used to obtain the output current signal. The fabricated DPF-VCO consumes only 0.78 mA, 0.97 mA, and 1.17 mA under the supply voltage of 1, 1.1, and 1.2 V, respectively, and the corresponding measured phase noise is -104dBc/Hz, -112dBc/Hz, and -115dBc/Hz at 1 MHz offset frequency. The best FOM of the proposed DPF-VCO is -201dBc/Hz.

Original languageEnglish
Article number5871694
Pages (from-to)386-388
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number7
StatePublished - 1 Jul 2011


  • Colpitts
  • double-positive-feedback voltage-controlled oscillator (DPF-VCO)
  • negative resistance
  • phase noise

Fingerprint Dive into the research topics of 'The design of double-positive-feedback voltage-controlled oscillator'. Together they form a unique fingerprint.

Cite this