High-frequency crystal oscillator outputting a harmonic component
US6549083B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | May 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/362
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high-frequency crystal oscillator capable of outputting a signal at a frequency, for example, higher than 500 MHz without using a multiplication amplifier. The high-frequency crystal oscillator comprises a voltage controlled Colpitts oscillation circuit operating at the fundamental frequency of a quartz-crystal element, means for increasing the level of harmonic component in an output from the Colpitts oscillation circuit, an SAW (Surface Acoustic Wave) filter for selecting a component of a predetermined order of the harmonic component, and a broadband amplifier for amplifying the component selected by the SAW filter. The means for increasing the levels of harmonic component is, for example, a resistor for setting the operating point of a transistor in the oscillation circuit such that an output signal is distorted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.