Low noise oscillator
US5218325A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1992 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Mar 31, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2201/0208
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low noise oscillator for use in a radio which provides an output signal with high signal-to-noise ratio. The low noise oscillator includes a voltage controlled oscillator which produces an intermediate sinusoidal voltage signal in response to a DC tuning voltage. The voltage controlled oscillator includes a varactor and junction field effect transistor. The low noise oscillator also includes a buffer amplifier which receives the intermediate sinusoidal voltage signal from a tapped microstrip of the voltage controlled oscillator and produces a highly stable output signal proportional to the DC tuning voltage applied to the input of the low noise oscillator. The buffer amplifier employs a dual gate Gallium Arsenide field effect transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.