Voltage-controlled oscillator and communication device using the same
US7839229B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2007 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Dec 5, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2201/0208
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention provides a voltage-controlled oscillator operating from microwave frequencies to millimeter wave frequencies, which is capable of outputting a large power with an output impedance thereof being set up to a predetermined level at low power consumption, and a communication device using the same. The voltage-controlled oscillator includes: a differential alternating current generator including a resonator capable of varying resonant frequency according to an input control voltage, for generating a pair of differential alternating current each of which having the same frequency with the resonant frequency of the resonator yet being 180 degrees out of phase in mutual; a pair of transformers each of which having a primary inductor and a secondary inductor, for conducting the alternating current to the primary inductor; and an impedance-matching circuit connected to the secondary inductor of the transformers, wherein an output signal is outputted from the secondary inductors of the transformers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.