Negative resistance oscillator with additional bias current injection
US7728687B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Aug 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/1271
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillation circuit and the method for operating the same. The circuit includes (a) an LC oscillator including an inductor and a variable capacitor; (b) first and second differentially-coupled transistors (i) electrically coupled to the LC oscillator and (ii) configured to provide negative resistance to the LC oscillator; and (c) a first current-injecting circuit (i) electrically coupled to the first differentially-coupled transistor and (ii) configured to inject a first additional electric current into the first differentially-coupled transistor so as to cause the first differentially-coupled transistor to create a first additional negative resistance to the LC oscillator; and (d) a second current-injecting circuit (i) electrically coupled to the second differentially-coupled transistor and (ii) configured to inject a second additional electric current into the second differentially-coupled transistor so as to cause the second differentially-coupled transistor to create a second additional negative resistance to the LC oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.