Voltage-controlled RF oscillator employing wideband tunable LC resonator
US4500854A · kind A · utility
15Cited by
4References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1981 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Apr 20, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/004
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Stray capacitance is reduced in a wideband tunable oscillator network by arranging the resonant circuit as one or more series circuit branches wherein a variable capacitance such as a varactor diode is interposed between two substantially identical inductors. In the disclosed VHF-UHF oscillator, the inductors are realized by TEM transmission lines of the stripline variety. The stripline is formed by a multilayer printed circuit board arrangement and two resonant circuit branches are interconnected in a manner that permits biasing of the varactor diodes without the use of blocking capacitors in the resonant circuit path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.