Linearization scheme for voltage controlled oscillator
US6396356B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | May 23, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A VCO system for equalizing a positive frequency deviation and a negative frequency deviation by using two varactors is described. The VCO system includes an active circuit and an oscillating circuit. The active circuit includes a first input, a second input coupled to ground and an output. The oscillating circuit is coupled to the output of the active circuit, including: a first varactor controlled by a first variable voltage; a second varactor controlled by a second variable voltage, connected in parallel to the first varactor; and an inductor connected in parallel to the first varactor and to the second varactor. An output signal of the oscillating circuit is fed back to the first input of the active circuit. The output signal of the oscillating circuit has a variable frequency in response to first and second variable voltages of the first and second varactors, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.